Python-3.4.3/C3/Conditional-Statements/English
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Show Slide title | Welcome to the spoken tutorial on Conditional statements. |
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Objectives
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In this tutorial, we will learn to use
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System Specifications |
To record this tutorial, I am using
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Pre-requisite
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To practice this tutorial, you should know how to use
If not, see the relevant Python tutorials on this website. |
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First let us learn about if condition.
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if else condition Box line by line
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Next we will see about if else condition.
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Open the terminal | Let us start ipython.
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Type ipython3
press Enter |
Type ipython3 and press Enter.
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Type: num = int(input())
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Now let us check if an entered number is even or not.
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Type
if num % 2 == 0: print ('Even')else: print ('Odd')
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Type, if num percentage 2 equal to equal to 0 colon
print inside brackets inside single quotes Even
print inside brackets inside single quotes Odd
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Next we will see another conditional statement called elif.
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For example,
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Type a = -3
if a > 0: print ("positive") elif a < 0: print ("negative") else: print ("zero")
Highlight negative Highlight zero |
Let us understand if/elif/else ladder with an example.
Press Enter twice to see the output. |
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Highlight elif |
We can also have any number of elif conditions within an if/elif/else statements.
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Pause the video.
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Assignment 1 |
Given a number, num as input.
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Show Slide Solution 1 | The solution is on your screen.
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Slide:
Ternary operator syntax: [A] if <condition> else [B]
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Next let us learn about ternary operator.
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Type, a = 4 | Let us write a ternary conditional statement to find the largest of two numbers.
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Type, b = 2 | b is equal to 2 |
Type, large_num = a if a > b else b | large underscore num is equal to a if a greater than b else b |
Type, print(large_num) | print inside brackets large underscore num
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Pause the video.
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Assignment 2 |
Given a number, n as input.
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Show Slide Solution 2 | The solution is on your screen.
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Pass statement
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Next we will learn about pass statement.
The pass statement acts as a null operation (i.e) nothing happens when it executes.
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Type a = 11 | Let us understand the pass statement with an example.
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Type,
if a%2 == 0: print(‘even’)else: pass |
Then type as shown.
Else no operation is performed.
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Summary
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This brings us to the end of the tutorial.
<<PAUSE>> |
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Evaluation
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Here are some self assessment questions for you to solve.
Print Good Morning if it is less than 12, otherwise print Hello. Use if else statement.
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Solutions |
And the answers,
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Show Slide Forum | Please post your timed queries in this forum. |
Show Slide Fossee Forum | Please post your general queries on Python in this forum. |
Show Slide Textbook Companion | FOSSEE team coordinates the TBC project. |
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Acknowledgment |
Spoken Tutorial Project is funded by NMEICT, MHRD, Govt. of India.
For more details, visit this website. |
Previous slide | This is Priya from IIT Bombay signing off. Thanks for watching. |