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Indefinite Loop - While and Loop

Indefinite Loop - While and Loop

This lesson will discuss two indefinite loop: While and Loop.

We'll cover the following...

While loop

While loop also iterates until a specific condition is reached. However, in the case of a while loop, the number of iterations is not known in advance.

Syntax

The while keyword is followed by a condition that must be true for the loop to continue iterating and then begins the body of the loop.

The general syntax is :

Example

The following example makes use of a while loop to print a variable value. The loop terminates when the variable’s value modulus 2 equals 1.

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fn main() {
  let mut var = 1; //define an integer variable
  let mut found = false; // define a boolean variable
  // define a while loop
  while !found {
      var=var+1;
      //print the variable
      println!("{}", var);
      // if the modulus of variable is 1 then found is equal to true
      if var % 2 == 1 {
        found = true; 
      }
      println!("Loop runs");
  }
}

Explanation

  • A mutable variable, var, is defined on line 2.
  • A mutable
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