Python/C3/I-O/English-timed - Revision history

PoojaMoolya at 07:26, 10 March 2017

2017-03-10T07:26:09Z

PoojaMoolya at 11:30, 20 February 2017

2017-02-20T11:30:58Z

Gaurav at 09:34, 10 July 2014

2014-07-10T09:34:37Z

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Sneha at 11:43, 20 March 2013

2013-03-20T11:43:52Z

Sneha at 11:51, 18 March 2013

2013-03-18T11:51:59Z

Minal: Created page with '{| border=1 !Visual Cue !Narration |- | 0:00 | Hello friends and welcome to this tutorial on 'Input/Output'. |- | 0:05 | At the end of this tutorial,you will be able to, # Prin…'

2013-01-02T12:04:34Z

Created page with '{| border=1 !Visual Cue !Narration |- | 0:00 | Hello friends and welcome to this tutorial on 'Input/Output'. |- | 0:05 | At the end of this tutorial,you will be able to, # Prin…'

New page

{| border=1
!Visual Cue
!Narration
|-
| 0:00
| Hello friends and welcome to this tutorial on 'Input/Output'.

|-
| 0:05
| At the end of this tutorial,you will be able to,

# Print some value.
# Print using modifiers.
# Take input from user.
# Display a prompt to the user before taking the input.

|-
| 0:20
| So type ipython on our terminal.
|-
| 0:26
| Type a = within double quotes This is a string
Type a
Type print a

|-
| 0:45
| obviously, <tt>print a</tt>, prints the value of <tt>a</tt>.

|-
| 0:52
| As you can see, even when you type just a, the value of a is shown.

|-
| 0:59
| But there is a difference.

|-
| 1:01
| Typing just <tt>a</tt> displays the content of <tt>a</tt> whereas the statement <tt>print a</tt> prints the string itself.

|-
| 1:08
| This difference becomes more evident when we use strings with newlines in them.

|-
|1:14
|Type b = within double quotes A line backslash n New line and hit enter
Type b
Type print b

|-
| 1:35
| As you can see, just typing <tt>b</tt> shows that b contains a newline character but While typing <tt>print b</tt>,it prints the string and hence the newline.

|-
| 1:46
| Moreover when we type just <tt>a</tt>, the value a is shown only in interactive mode and does not have any effect on the program while running it as a script.

|-
| 2:00
| We shall look at different ways of outputting the data.

|-
| 2:04
| print statement in python supports string formatting.

|-
| 2:08
| Various arguments can be passed to print using modifiers.

|-
| 2:12
| type x = 1.5
y = 2
z = within double quotes red
print within double quotes x is modula 2 dot 1f comma y is modula d comma z is modula s then again a modula within brackets x comma y comma z

|-
| 2:51
| As you can see, the values of x, y and z are substituted in place of the modifiers <tt>modula 2.1f</tt>, <tt>modula d</tt> and <tt>modula s</tt> respectively.

|-
| 3:03
| Pause the video here, try out the following exercise and resume the video.

|-
| 3:08
| What happens when you do <tt>print within double quotes x is modula d comma y is modula f modula within brackets x comma y</tt>

|-
| 3:19
| Switch to the terminal for solution.

|-
|3:24
| Type print within double quotes x is modula d comma y is modula f modula within brackets x comma y

|-
| 3:50
| We see that the <tt>int</tt> value of x and <tt>float</tt> value of y are printed corresponding to the modifiers used in the print statement.

|-
| 3:58
| We have seen that <tt>print</tt> statement prints a new line character everytime it is called.

|-
| 4:04
| This can be suppressed by using a " comma " at the end of the <tt>print</tt> statement.

|-
| 4:13
| Let us see this by typing out following code on an editor as print underscore example.py

|-
| 4:24
| So Type..

|-
|4:44
|print "Hello"
print "World"

print "Hello" comma
print "World"

|-
| 5:22
| Save the script as 'print underscore example.py' and run it using modula run slash home slash fossee slash print underscore example.py

|-
| 5:34
| As we can see, the print statement when used with comma in the end, prints a space instead of a new line.

|-
| 5:46
| Now we shall look at taking input from the user.

|-
| 6:06
| We will use the ~~raw underscore input~~ for this.

|-
|6:11
|So type ip = raw underscore input()

|-
| 6:23
| The cursor is blinking indicating that it is waiting for input, so type something and hit enter.

|-
|6:32
|So you can type an input

|-
| 6:35
| Now let us see what is the value of ip by typing it.

|-
|6:41
|So type ip and hit enter

|-
| 6:45
| We can see that it contains the string "an input"

|-
| 6:51
| Pause the video here, try out the following exercise and resume the video.

|-
| 6:58
| You have an question

|-
| 7:02
| Enter the number 5.6 as input and store it in a variable called c.

|-
| 7:11
| Switch to the terminal for solution.

|-
| 7:15
| We have to use the raw underscore input command with variable c.

|-
|7:19
|So type c = raw underscore input() and hit enter
Put 5.6
And again enter.
Type c

|-
| 7:36
| Now let us see the type of c.

|-
|7:40
|Type type within brackets c

|-
| 7:46
| We see that c is a string.

|-
| 7:49
| This implies that anything you enter as input, it will be taken as a string no matter what you enter.

|-
| 7:55
| Pause the video here, try out the following exercise and resume the video.

|-
| 7:59
| What happens when you do not enter anything and hit enter.

|-
| 8:04
| Switch to the terminal for solution.

|-
|8:08
| Type d = raw underscore input()
<RET>
d

|-
| 8:28
| We see that when nothing is entered, an empty string is considered as input.

|-
| 8:32
| raw underscore input also can display a prompt to assist the user.

|-
|8:37
|So type name = raw underscore input within brackets within double quotes Please enter your name:

|-
| 8:48
| It prints the string given as argument and then waits for the user input.

|-
| 8:54
| Let us do one more exercise.

|-
| 8:56
| Pause the video here, try out the following exercise and resume the video.

|-
| 9:00
| How do you display a prompt and let the user enter input in next line.

|-
| 9:09
| Switch to the terminal for solution.

|-
| 9:12
| The trick is to include a newline character at the end of the prompt string.

|-
|9:17
|Type ip = raw underscore input within brackets within double quotes Please enter a number in the next line backslash n>

|-
| 9:28
| It prints the newline character and hence the user enters input in the next line

|-
| 9:35
| This brings us to the end of the tutorial.

|-
| 9:39
| In this tutorial, we have learnt to,1. Use the print statement.

|-
| 9:42
| 2. Use the modifiers modula d, modula f, modula s in the print statement.

|-
| 9:47
| 3. Take input from user by using <tt>raw underscore input()</tt>.

|-
| 9:55
| 4. Display a prompt to the user before taking the input by passing a string as an argument to <tt>raw underscore input</tt>.

|-
| 10:04
| Here are some self assessment questions for you to solve

|-
| 10:08
| 1. <tt>a = raw underscore input()</tt> and user enters <tt>2.5</tt>.

|-
| 10:13
| What is the type of a?
** str
** int
** float
** char

|-
| 10:20
| 2. <tt>'''a = 2</tt> and <tt>b = 4.5</tt>.

|-
| 10:27
| What does ``print "a is modula d and b is'''<br/> Inline literal start-string without end-string.<br/> modula 2.1f" modula within brackets b comma a`` print?
** a is 2 and b is 4.5
** a is 4 and b is 2
** a is 4 and b is 2.0
** a is 4.5 and b is 2

|-
| 10:50
| And the answers,

|-
| 10:53
| 1.No matter what you enter, it will be taken as a string.

|-
| 10:58
| Hence 2.5 is a string.

|-
| 11:01
| 2. Since 'b' is called first, It will display integer value of 'a' because the modifier used is modula d.

|-
| 11:10
| Similarly, 'b' will get the float value of 'a' due to it's modifier modula 2.1f.

|-
| 11:18
| Hence 'a' will be 4 and 'b' 2.0 .

|-
| 11:24
| Hope you have enjoyed this tutorial and found it useful.

|}

@@ Line 221: / Line 221: @@
 |-
 |08:08
-|  Type d = raw underscore input()
+|  Type d = raw underscore input(). Type d
-<RET>
-−
 |-

@@ Line 9: / Line 9: @@
 | 00:05
 | At the end of this tutorial,you will be able to,
 Print some value.
-# Print some value.
+Print using modifiers.
-# Print using modifiers.
+Take input from user.
-# Take input from user.
+Display a prompt to the user before taking the input.
-# Display a prompt to the user before taking the input.
 |-
@@ Line 21: / Line 20: @@
 |-
 | 00:26
-| Type a = within double quotes This is a string
+|Type a = within double quotes This is a string
-  Type a
+Type a
-  Type print a
+Type print a
 |-
@@ Line 48: / Line 47: @@
 |01:14
 |Type b =  within double quotes A line backslash n New line and hit enter
- Type b
+Type b
- Type print b
+Type print b
 |-
@@ Line 74: / Line 73: @@
 | 02:12
 | type x = 1.5
-       y = 2
+y = 2
-       z = within double quotes red
+z = within double quotes red
-       print  then in double quotes x is modula 2 dot 1f comma  y is modula d comma  z is modula s then again a modula within brackets x comma y comma z
+print  then in double quotes x is modula 2 dot 1f comma  y is modula d comma  z is modula s then again a modula within brackets x comma y comma z
@@ Line 121: / Line 120: @@
 |04:44
 |print "Hello"
- print "World"
+print "World"
 print "Hello" comma
- print "Hello" comma
+print "World"
- print "World"
 |-
@@ Line 189: / Line 187: @@
 |07:19
 |So type c = raw underscore input() and hit enter
- Put 5.6
+Put 5.6
- And again enter.
+And again enter.
- Type c
+Type c
 |-
@@ Line 224: / Line 222: @@
 |08:08
 |  Type d = raw underscore input()
-	<RET>
+<RET>
-−
+d
 |-
@@ Line 249: / Line 247: @@
 |-
 | 08:56
-|  Pause the video here, try out the following exercise and resume the video.
+|Pause the video here, try out the following exercise and resume the video.
 |-
@@ Line 277: / Line 275: @@
 |-
 | 09:39
-| In this tutorial, we have learnt to,1. Use the print statement.
+| In this tutorial, we have learnt to, Use the print statement.
 |-
 | 09:42
-| 2. Use the modifiers modula d, modula f, modula s in the print statement.
+|Use the modifiers modula d, modula f, modula s in the print statement.
 |-
 | 09:47
-| 3. Take input from user by using raw underscore input().
+| Take input from user by using raw underscore input().
 |-
 | 09:55
-| 4. Display a prompt to the user before taking the input by passing a string as an argument to raw underscore input.
+| Display a prompt to the user before taking the input by passing a string as an argument to raw underscore input.
 |-
@@ Line 297: / Line 295: @@
 |-
 | 10:08
-| 1. a = raw underscore input()  and user enters 2.5 .
+|  a = raw underscore input()  and user enters 2.5 .
 |-
 | 10:13
 | What is the type of a?
-** str
+str
-** int
+int
-** float
+float
-** char
+char
 |-
@@ Line 314: / Line 312: @@
 | 10:27
 | What does ``print "a is modula d and b is'''  In line literal start-string without end-string. modula 2.1f" modula within brackets b comma a`` print?
-** a is 2 and b is 4.5
+a is 2 and b is 4.5
-** a is 4 and b is 2
+a is 4 and b is 2
-** a is 4 and b is 2.0
+a is 4 and b is 2.0
-** a is 4.5 and b is 2
+a is 4.5 and b is 2
 |-
@@ Line 333: / Line 331: @@
 |-
 | 11:01
-| 2. Since 'b' is called first, It will display integer value of 'a' because the modifier used is modula d.
+| Since 'b' is called first, It will display integer value of 'a' because the modifier used is modula d.
 |-

@@ Line 17: / Line 17: @@
 |-
 | 0:20
-| So type ipython on our terminal.
+| So type ipython in the terminal.
 |-
 | 0:26
@@ Line 76: / Line 76: @@
         y = 2
         z = within double quotes red
-        print   within double quotes x is modula 2 dot 1f comma  y is modula d comma  z is modula s then again a modula within brackets x comma y comma z
+        print  then in double quotes x is modula 2 dot 1f comma  y is modula d comma  z is modula s then again a modula within brackets x comma y comma z
@@ Line 89: / Line 89: @@
 |-
 | 3:08
-| What happens when you do print  within double quotes x is modula d comma  y is modula f modula within brackets x comma  y
+| What happens when you do print  within double quotes x is modula d comma  y is modula f modula  x comma  y
 |-
 | 3:19
@@ Line 161: / Line 161: @@
 |-
 |6:41
-|So type ip and hit enter
+|So type ip on the terminal and hit enter
 |-
@@ Line 258: / Line 258: @@
 |-
 | 9:09
-| Switch to the terminal for solution.
+| Switch to the terminal now.
 |-
@@ Line 266: / Line 266: @@
 |-
 |9:17
-|Type ip = raw underscore input within brackets  within double quotes Please enter a number in the next line backslash n>
+|Type ip = raw underscore input within brackets  within double quotes Please enter a number in the next line backslash n
 |-

@@ Line 27: / Line 27: @@
 |-
 | 0:45
-| obviously, <tt>print a</tt>, prints the value of <tt>a</tt>.
+| obviously,  print a , prints the value of a .
 |-
@@ Line 39: / Line 39: @@
 |-
 | 1:01
-| Typing just <tt>a</tt> displays the content of <tt>a</tt> whereas the statement <tt>print a</tt> prints the string itself.
+| Typing just   a  displays the content of  a  whereas the statement  print a  prints the string itself.
 |-
@@ Line 53: / Line 53: @@
 |-
 | 1:35
-| As you can see, just typing <tt>b</tt> shows that b contains a newline character but While typing <tt>print b</tt>,it prints the string and hence the newline.
+| As you can see, just typing  b  shows that b contains a newline character but While typing print b,it prints the string and hence the newline.
 |-
 | 1:46
-| Moreover when we type just <tt>a</tt>, the value a is shown only in interactive mode and does not have any effect on the program while running it as a script.
+| Moreover when we type just  a , the value a is shown only in interactive mode and does not have any effect on the program while running it as a script.
 |-
@@ Line 81: / Line 81: @@
 |-
 | 2:51
-| As you can see, the values of x, y and z are substituted in place of the modifiers <tt>modula 2.1f</tt>, <tt>modula d</tt> and <tt>modula s</tt> respectively.
+| As you can see, the values of x, y and z are substituted in place of the modifiers modula 2.1f, modula d and modula s respectively.
 |-
@@ Line 89: / Line 89: @@
 |-
 | 3:08
-| What happens when you do <tt>print  within double quotes x is modula d comma  y is modula f modula within brackets x comma  y</tt>
+| What happens when you do print  within double quotes x is modula d comma  y is modula f modula within brackets x comma  y
-−
 |-
 | 3:19
@@ Line 101: / Line 100: @@
 |-
 | 3:50
-| We see that the <tt>int</tt> value of x and <tt>float</tt> value of y are printed corresponding to the modifiers used in the print statement.
+| We see that the int value of x and float   value of y are printed corresponding to the modifiers used in the print statement.
 |-
 | 3:58
-| We have seen that <tt>print</tt> statement prints a new line character everytime it is called.
+| We have seen that print statement prints a new line character every time it is called.
 |-
 | 4:04
-| This can be suppressed by using a " comma " at the end of the <tt>print</tt> statement.
+| This can be suppressed by using a " comma " at the end of the print statement.
 |-
@@ Line 287: / Line 286: @@
 |-
 | 9:47
-| 3. Take input from user by using <tt>raw underscore input()</tt>.
+| 3. Take input from user by using raw underscore input().
 |-
 | 9:55
-| 4. Display a prompt to the user before taking the input by passing a string as an argument to <tt>raw underscore input</tt>.
+| 4. Display a prompt to the user before taking the input by passing a string as an argument to raw underscore input.
 |-
@@ Line 299: / Line 298: @@
 |-
 | 10:08
-| 1. <tt>a = raw underscore input()</tt> and user enters <tt>2.5</tt>.
+| 1. a = raw underscore input()  and user enters 2.5 .
 |-
@@ Line 311: / Line 310: @@
 |-
 | 10:20
-| 2. <tt>'''a = 2</tt> and <tt>b = 4.5</tt>.
+| 2. '''a = 2 and b = 4.5.
 |-
 | 10:27
-| What does ``print "a is modula d and b is'''<br/> Inline literal start-string without end-string.<br/> modula 2.1f" modula within brackets b comma a`` print?
+| What does ``print "a is modula d and b is'''  In line literal start-string without end-string. modula 2.1f" modula within brackets b comma a`` print?
 ** a is 2 and b is 4.5
 ** a is 4 and b is 2