---
title: "5.2 do-while Loop"
description: "A `do-while` loop repeatedly executes a block of statements while its controlling condition evaluates to `true`. Unlike a `while` loop, the condition is evaluated **after** the loop body, ensuring that the body executes at least once. The `do-while` loop is…"
url: "https://edcret.in/docs/cpp-programming/loops/5-2-do-while-loop/"
updated: "2026-09-06"
category: C++ Programming / Loops
---

# 5.2 do-while Loop

A `do-while` loop repeatedly executes a block of statements while its controlling condition evaluates to `true`. Unlike a `while` loop, the condition is evaluated **after** the loop body, ensuring that the body executes at least once.

The `do-while` loop is useful when an operation must be performed before its continuation condition can be evaluated, such as displaying a menu or accepting user input.

## Source Code

```
#include <iostream>

int main()
{
    int count = 1;

    do
    {
        std::cout << "Count: " << count << '\n';
        ++count;
    }
    while (count <= 5);

    return 0;
}
```

## Output

```
Count: 1
Count: 2
Count: 3
Count: 4
Count: 5
```

## Explanation

- `do` begins the loop body.
- The statements inside the `do` block are executed before the condition is evaluated.
- `std::cout` displays the current value of `count`.
- `++count` increments `count` by one after each iteration.
- `while (count <= 5)` evaluates the loop condition after the loop body has executed.
- If the condition evaluates to `true`, the loop body executes again.
- If the condition evaluates to `false`, the loop terminates.
- Because the condition is checked after the loop body, a `do-while` loop always executes its body at least once.
- The semicolon after `while (count <= 5);` is required syntax for a `do-while` statement.
- `return 0;` terminates the program successfully.