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Rust

Control Flow in Rust

Control Flow

69

#description

In Rust, control flow refers to the order in which statements and expressions are executed within a program. Control flow is managed using different programming constructs such as conditional statements, loops, and match expressions, among others.

Conditional statements in Rust allow a program to make decisions based on certain conditions. The if-else statement is the most commonly used conditional statement in Rust.

For example:

                    
let number = 10;
if number > 5 {
    println!("Number is greater than 5");
} else {
    println!("Number is less than or equal to 5");
}
                  

Loops in Rust are used to repeatedly execute a block of code until a certain condition is met. There are three types of loops in Rust: loop, while, and for. The loop statement creates an infinite loop until it is explicitly broken. The while statement repeatedly executes a block of code while a certain condition is true. The for statement is used to iterate over a collection of items.

For example:

                    
let mut x = 0;
while x < 5 {
    println!("The value of x is: {}", x);
    x += 1;
}

for number in 0..5 {
    println!("The value of number is: {}", number);
}
                  

Match expressions in Rust are used to compare a value against a set of patterns and execute the corresponding branch if there is a match. Match expressions can be used to replace long chains of if-else statements.

For example:

                    
let x = 3;
match x {
    1 => println!("One"),
    2 => println!("Two"),
    3 => println!("Three"),
    _ => println!("Other"), // default case
}
                  

In summary, control flow is an important concept in Rust programming and is used to manage the flow of code execution within a program. Rust provides various control flow constructs such as conditional statements, loops, and match expressions to facilitate this.

March 27, 2023

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