While loop Syntax in C/C++

Syntax:

while (condition) {
    // Code block to be executed repeatedly as long as the condition is true
}

Explanation of the Syntax:

  • In C and C++, the while loop executes a block of code repeatedly as long as the specified condition evaluates to true.
  • The loop first evaluates the condition specified within the parentheses ().
  • If the condition is true, the code block within the curly braces {} is executed.
  • After executing the code block, the loop returns to the beginning and re-evaluates the condition.
  • If the condition remains true, the process continues; otherwise, the loop terminates.

Implementation of While loop Syntax in C/C++:

C++




#include <iostream>
using namespace std;
 
int main()
{
    int i = 0;
    while (i < 10) {
        cout << i << " ";
        i++;
    }
    return 0;
}


C




#include <stdio.h>
 
int main()
{
    int i = 0;
    while (i < 10) {
        printf("%d ", i);
        i++;
    }
    return 0;
}


Output

0 1 2 3 4 5 6 7 8 9 

While loop Syntax

While loop is a fundamental control flow structure (or loop statement) in programming, enabling the execution of a block of code repeatedly as long as a specified condition remains true. Unlike the for loop, which is tailored for iterating a fixed number of times, the while loop excels in scenarios where the number of iterations is uncertain or dependent on dynamic conditions.

Table of Content

  • While loop Syntax in C/C++
  • Java While loop Syntax
  • While loop Syntax in Python
  • While loop Syntax in C#
  • While loop Syntax in JavaScript

The syntax of While loop varies slightly depending on the programming language, but the basic structure is similar across many languages.

while (condition) {
    // Code block to be executed repeatedly as long as the condition is true
}

Here’s a general overview of the Syntax of While loop:

  1. Condition: This is the condition that is evaluated before each iteration of the loop. If the condition is true, the loop body is executed; otherwise, the loop terminates.
  2. Loop Body: This is the block of code that gets executed if the condition is true.
  3. Update: Inside the loop body, there should be some logic to change the variables involved in the condition so that the loop eventually terminates. Otherwise, you risk creating an infinite loop.

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