---
title: "2.12 do-while Loop"
description: "The `do-while` loop executes its block once before checking the condition. After each iteration, the condition is evaluated to determine whether another iteration should occur. ``` #include int main() { int i = 1; do { printf(\"%d\\n\", i); i++; }…"
url: "https://edcret.in/docs/c-programming/control-flow/2-12-do-while-loop/"
updated: "2026-09-06"
category: C Programming / Control Flow
---

# 2.12 do-while Loop

The `do-while` loop executes its block once before checking the condition. After each iteration, the condition is evaluated to determine whether another iteration should occur.

```
#include <stdio.h>

int main()
{
    int i = 1;

    do
    {
        printf("%d\n", i);
        i++;
    }
    while (i <= 5);

    return 0;
}
```

### Example Output

```
1
2
3
4
5
```

### Explanation

The loop body executes before the condition is evaluated:

```
do
{
    printf("%d\n", i);
    i++;
}
while (i <= 5);
```

After the first iteration, `i` is incremented and the condition is checked:

```
while (i <= 5);
```

The loop continues while the condition evaluates to a non-zero value.

Unlike a `while` loop, a `do-while` loop always executes its body **at least once**, even when the condition is initially false.

The semicolon after the `while` condition is required.