While Loop in Programming

  • The while loop is used when you don’t know in advance how many times you want to execute the block of code. It continues to execute as long as the specified condition is true.
  • It’s important to make sure that the condition eventually becomes false; otherwise, the loop will run indefinitely, resulting in an infinite loop.

Example:

C++
#include <iostream>
using namespace std;

int main()
{
    int count = 0;
    while (count < 5) {
        cout << count << "\n";
        count += 1;
    }
    cout << endl;
    return 0;
}
C
#include &lt;stdio.h&gt;

int main()
{
    int count = 0;
    while (count &lt; 5) {
        printf(&quot;%d\n&quot;, count);
        count += 1;
    }
    return 0;
}
Java
public class Main {
    public static void main(String[] args) {
        int count = 0;

        // Example: While loop to print numbers from 0 to 4
        while (count < 5) {
            System.out.println(count);
            count += 1;
        }

        System.out.println();
    }
}
Python3
count = 0
while count &lt; 5:
    print(count)
    count += 1
Javascript
let count = 0;
while (count < 5) {
    console.log(count);
    count += 1;
}
console.log();

Output
0
1
2
3
4

This prints the numbers 0 through 4, similar to the for loop example.

Difference between For Loop and While Loop in Programming

Both for loops and while loops are control flow structures in programming that allow you to repeatedly execute a block of code. However, they differ in their syntax and use cases. It is important for a beginner to know the key differences between both of them.

Difference between For Loop and While Loop

Similar Reads

For Loop in Programming:

The for loop is used when you know in advance how many times you want to execute the block of code.It iterates over a sequence (e.g., a list, tuple, string, or range) and executes the block of code for each item in the sequence.The loop variable (variable) takes the value of each item in the sequence during each iteration....

While Loop in Programming:

The while loop is used when you don’t know in advance how many times you want to execute the block of code. It continues to execute as long as the specified condition is true.It’s important to make sure that the condition eventually becomes false; otherwise, the loop will run indefinitely, resulting in an infinite loop....

Difference between For Loop and While Loop in Programming:

Key differences between for and while loops:...

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