Do-While Loop Basics

Snippet

Do-While Loop Basics

The do-while loop is a post-condition loop that always executes its body at least once before checking the condition. The syntax is: do { statement; } while (condition);. This is useful when you need to perform an action first and only decide whether to repeat based on the result. Contrast this with the while loop which checks the condition before executing the body.

snippet.cpp
cpp
#include <iostream>
 
int main() {
    int count = 1;
    
    do {
        std::cout << "Count: " << count << std::endl;
        count++;
    } while (count <= 5);
    
    return 0;
}

Breakdown

do { ... }

Starts the loop body that will execute at least once

std::cout << "Count: " << count << std::endl;

Prints current count value each iteration

count++;

Increments count by 1 after printing

} while (count <= 5);

Condition checked AFTER body executes; loop repeats if true

while (count <= 5)

Unlike while, this would check BEFORE first execution

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