Rust-Programming-Language/C2/Enums/English - Revision history

Madhurig at 07:55, 29 August 2025

2025-08-29T07:55:14Z

Madhurig at 12:27, 25 August 2025

2025-08-25T12:27:44Z

Madhurig at 11:57, 21 August 2025

2025-08-21T11:57:38Z

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Nirmala Venkat: Created page with "{| border="1" |- || '''Visual Cue''' || '''Narration''' |- || '''Slide 1''' || Welcome to the Spoken Tutorial on
2025-08-18T09:14:48Z

Created page with "{| border="1" |- || '''Visual Cue''' || '''Narration''' |- || '''Slide 1''' || Welcome to the Spoken Tutorial on Welcome to the Spoken Tutorial on '''Enums in Rust.'''
|- style="background-color:transparent;border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"
|| '''Slide 2'''

'''Learning Objectives'''
|| In this tutorial, we will learn about:
* <div style="color:#000000;margin-left:1.27cm;margin-right:0cm;">Enums</div>

|- style="background-color:transparent;border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.136cm;padding-right:0.191cm;"
|| '''Slide 3'''

'''System Requirements'''
|| This tutorial is recorded using,
* <div style="margin-left:1.27cm;margin-right:0cm;">Ubuntu Linux OS version 22.04</div>
* <div style="margin-left:1.27cm;margin-right:0cm;">Rust 1.80.0 </div>
* <div style="margin-left:1.27cm;margin-right:0cm;">Visual Studio Code 1.19.0</div>

|- style="background-color:transparent;border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.136cm;padding-right:0.191cm;"
|| '''Slide 4'''

'''Prerequisites'''
|| To follow this tutorial, you should be familiar with compiling and running a Rust program.
|- style="background-color:transparent;border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.136cm;padding-right:0.191cm;"
|| '''Slide''' '''5'''

'''Code Files'''
||
* <div style="color:#000000;margin-left:1.27cm;margin-right:0cm;">The following code file is required to practise this tutorial.</div>
* <div style="color:#000000;margin-left:1.27cm;margin-right:0cm;">This file is provided in the Code Files link of this tutorial page.</div>

|- style="background-color:transparent;border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.136cm;padding-right:0.191cm;"
|| '''Slide 6'''

'''Enum'''
||
* <div style="color:#000000;margin-left:1.27cm;margin-right:0cm;">Enums (or enumerations) is a user-defined data type.</div>
* <div style="color:#000000;margin-left:1.27cm;margin-right:0cm;">It allows us to select a value from a list of related values.</div>
* <div style="color:#000000;margin-left:1.27cm;margin-right:0cm;">An enumerated type is declared using the '''enum''' keyword.</div>

|- style="background-color:transparent;border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.136cm;padding-right:0.191cm;"
| style="color:#000000;" |
|| Let us understand about '''enums''' using a''' rust''' program.
|- style="background-color:transparent;border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"
|| Open '''Visual''' '''code editor'''
|| Open the '''Visual studio code editor.'''
|- style="background-color:transparent;border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"
|| In the menu bar, click on '''Terminal''' and select''' New Terminal'''.

|| In the menu bar, click on '''Terminal''' and select''' New Terminal'''.

<div style="color:#000000;"></div>
|- style="background-color:transparent;border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"
|| '''> cd''' '''Desktop'''/'''MyRustProject'''

'''>''' '''cargo new enumdemo'''
'''In the menu bar, File >> Open folder >> Desktop >> MyRustProject >> enumdemo'''
|| Let us go to our working directory '''MyRustProject''' as explained earlier.

Type the command '''cargo new enumdemo '''and press '''Enter.'''
Open the created project as shown.
|- style="background-color:transparent;border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"
|| Point to the '''main.rs''' file.

| style="color:#000000;" | In the '''main.rs '''file, copy and paste the code from the Code file.
|- style="background-color:transparent;border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"
|| Pub enum Direction {

Up,

Down,

Left,

Right,

}

fn move_direction(dir: Direction) {

match dir {

Direction::Up => println!("Move Up"),

Direction::Down => println!("Move Down"),

Direction::Left <nowiki>=> println!("Move Left"),</nowiki>

Direction::Right <nowiki>=> println!("Move Right"),</nowiki>

}

}

fn main() {

let dir = Direction::Left;

move_direction(dir);

}

Press Ctrl+S
|| Here''' Direction '''is an '''enum''' with four possible values.

They are: up, down, left, and right.

These enum values are known as '''variants'''.

'''Direction'''::'''Up''' represents '''enum variant''' '''Up''' of the '''Direction''' enum

<div style="color:#000000;">We can access the '''enum''' variants whenever we have to use a '''direction''' in our program.</div>

In the''' main '''function, we are accessing the “'''Left'''” variant.

Save the program. Let us execute the code and see the output.
|- style="background-color:transparent;border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"
|| Click on terminal and select '''New Terminal.'''

In the terminal, type '''cargo run'''.

Point to the output.
|| In the menu bar, click on '''Terminal''' and select '''New Terminal.'''

In the terminal, type '''cargo run'''.

It prints “'''Move Left'''” as the output.
|- style="background-color:transparent;border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"
|| Delete the existing code.
|| Next we will see another example for '''enum'''.

Clear the window and copy and paste the code from the Code file.
|- style="background-color:transparent;border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"
|| use std::thread::sleep;

use std::time::Duration;

enum TrafficLight {

Red,

Yellow,

Green,

}

fn main() {

loop {

for item in (1..=28).rev() {

let now = match item {

1..=15 => TrafficLight::Red,

16..=18 => TrafficLight::Yellow,

19..=28 => TrafficLight::Green,

_ => TrafficLight::Red,

};

match now {

TrafficLight::Red => println!("🔴 Duration: {}", item),

TrafficLight::Yellow => println!("🟡 Duration: {}", item - 15),

TrafficLight::Green => println!("🟢 Duration: {}", item – 18),

} sleep(Duration::from_millis(1000));

}

}

}Ctrl+S
||

This code simulates a traffic light system which changes colors at specified intervals.

'''TrafficLight enum''' has 3 variants as Red, Yellow and Green.

The code imports the '''sleep''' function from the''' std:: thread '''module.

'''Duration struct '''from the''' std::time '''module is used to create pauses in the loop.

The '''main''' function begins with an infinite loop.

The '''for''' loop iterates over the range from''' '''1 to 28, in the reverse order.

Note that''' .rev() '''means reverse order.

The '''match''' statement assigns a value to the variable '''now''' based on the current '''item''' value.

The range values are assigned to red, yellow and green.

'''match''' statement is used to print the current color of the traffic light along with the duration.

After printing the traffic light status, the program pauses for 1 second i.e (1000 milliseconds) .

Then the loop continues.

Save the program.
|- style="background-color:transparent;border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"
|| In the terminal, type '''cargo run'''

press '''Ctrl''' and''' C''' keys
|| In the terminal, type '''cargo run'''

We can see that traffic light color and its duration running continuously.

To terminate the program, press '''Ctrl''' and''' C''' keys together.
|- style="background-color:transparent;border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"
|| '''Slide 7'''

'''Summary'''

In this tutorial, we learn about

'''Enums'''
|| This brings us to the end of this tutorial.

Let us summarize. 
|- style="background-color:transparent;border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"
|| '''Slide 8'''

'''Assignment'''
|| As an Assignment, do the following:

* <div style="margin-left:1.27cm;margin-right:0cm;">Define an '''enum''' '''Operation''' with variants: '''Add, Subtract, Multiply, and Divide.'''</div>
* <div style="margin-left:1.27cm;margin-right:0cm;">Write a function '''calculate''' with two f64 numbers and one '''Operation'''</div>
* <div style="margin-left:1.27cm;margin-right:0cm;">Function returns the f64 result.</div>
* <div style="margin-left:1.27cm;margin-right:0cm;">In the main function, call '''calculate''' with different operations and print the results.</div>

|- style="background-color:transparent;border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"
|| '''Slide 9'''

'''Thank You'''
|| Thank you for joining.

|-
|}
<div style="margin-left:-1.588cm;margin-right:-1.429cm;"></div>

@@ Line 22: / Line 22: @@
 || This tutorial is recorded using,
 * Ubuntu Linux OS version 22.04
-* Rust 1.80.0
+* Rust version 1.80.0
 * Visual Studio Code 1.19.0
@@ Line 49: / Line 49: @@
 |-
 ||
-|| Let us understand about '''enums''' using a''' rust''' program.
+|| Let us understand about '''enums''' using a ''' rust''' program.
 |-
 || Open '''Visual''' '''code editor'''
@@ Line 55: / Line 55: @@
 |-
 || In the menu bar, click on '''Terminal''' and select''' New Terminal'''.
 || In the menu bar, click on '''Terminal''' and select''' New Terminal'''.
@@ Line 112: / Line 113: @@
 Press Ctrl + S
-|| Here''' Direction ''' is an '''enum''' with four possible values.
+|| Here ''' Direction ''' is an '''enum''' with four possible values.
 They are: up, down, left, and right.
@@ Line 126: / Line 127: @@
 Save the program. Let us execute the code and see the output.
 |-
-|| Click on terminal and select '''New Terminal.'''
+|| Click on '''Terminal''' and select '''New Terminal.'''
 In the terminal, type '''cargo run'''.
@@ Line 209: / Line 210: @@
 '''match''' statement is used to print the current color of the traffic light along with the duration.
-After printing the traffic light status, the program pauses for 1 second that is (1000 milliseconds) .
+After printing the traffic light status, the program pauses for 1 second that is 1000 milliseconds.
 Then the loop continues.

@@ Line 8: / Line 8: @@
 '''Title Slide'''
-|| Welcome to the Spoken Tutorial on '''Enums in Rust.'''
+|| Welcome to the Spoken Tutorial on '''Enums in Rust '''.
 |-
 || '''Slide 2'''
@@ Line 36: / Line 36: @@
 ||
 * The following code file is required to practise this tutorial.
-* This file is provided in the Code Files link of this tutorial page.
+* This file is provided in the '''Code Files''' link of this tutorial page.
 |-
@@ Line 43: / Line 43: @@
 '''Enums'''
 ||
-* Enums (or enumerations) is a user-defined data type.
+* '''Enums''' (or enumerations) is a user-defined data type.
 * It allows us to select a value from a list of related values.
 * An enumerated type is declared using the '''enum''' keyword.
@@ Line 52: / Line 52: @@
 |-
 || Open '''Visual''' '''code editor'''
-|| Open the '''Visual studio code editor.'''
+|| Open the '''Visual Studio code editor.'''
 |-
 || In the menu bar, click on '''Terminal''' and select''' New Terminal'''.
@@ Line 68: / Line 68: @@
 Type the command '''cargo new enumdemo '''and press '''Enter.'''
 Open the created project as shown.
 |-
 || Point to the '''main.rs''' file.
-|| In the '''main.rs '''file, copy and paste the code from the Code file.
+|| In the '''main.rs ''' file, copy and paste the code from the Code file.
 |-
 || Pub enum Direction {
@@ Line 111: / Line 112: @@
 Press Ctrl + S
-|| Here''' Direction '''is an '''enum''' with four possible values.
+|| Here''' Direction ''' is an '''enum''' with four possible values.
 They are: up, down, left, and right.
-These enum values are known as '''variants'''.
+These '''enum''' values are known as '''variants'''.
-'''Direction'''::'''Up''' represents '''enum variant''' '''Up''' of the '''Direction''' enum
+'''Direction'''::'''Up''' represents '''enum variant Up''' of the '''Direction''' enum
 We can access the '''enum''' variants whenever we have to use a '''direction''' in our program.
-In the''' main '''function, we are accessing the “'''Left'''” variant.
+In the ''' main '''function, we are accessing the “'''Left'''” variant.
 Save the program. Let us execute the code and see the output.
@@ Line 188: / Line 189: @@
 }Ctrl + S
-||
+|| This code simulates a traffic light system which changes colors at specified intervals.
-−
 This code simulates a traffic light system which changes colors at specified intervals.
 '''TrafficLight enum''' has 3 variants as Red, Yellow and Green.
@@ Line 200: / Line 199: @@
 The '''main''' function begins with an infinite loop.
-The '''for''' loop iterates over the range from''' '''1 to 28, in the reverse order.
+The '''for''' loop iterates over the range from 1 to 28, in the reverse order.
 Note that''' .rev() '''means reverse order.
@@ Line 210: / Line 209: @@
 '''match''' statement is used to print the current color of the traffic light along with the duration.
-After printing the traffic light status, the program pauses for 1 second i.e (1000 milliseconds) .
+After printing the traffic light status, the program pauses for 1 second that is (1000 milliseconds) .
 Then the loop continues.
@@ Line 223: / Line 222: @@
 We can see that traffic light color and its duration running continuously.
-To terminate the program, press '''Ctrl''' and''' C''' keys together.
+To terminate the program, press '''Ctrl''' and ''' C''' keys together.
 |-
 || '''Slide 7'''