The meaning of do in c language

The do keyword is used in C to create a loop structure that allows a program to repeatedly execute a block of code until it stops when a specified condition is false. Syntax: do { // Loop body } while (conditional expression); First execute the loop body, and then evaluate the conditional expression. If it is true, the loop body will be executed again, if it is false, the loop will exit.

Meaning of do

do is used in C language to create a loop structure. It allows a program to repeatedly execute a block of code until a specific termination condition is met.

Syntax

##do The basic syntax of the statement is as follows:

<code class="c">do {
  // 循环体
} while (条件表达式);</code>

The loop body will be executed repeatedly until the conditions specified in the brackets The expression is false.

Working principle

First, execute the code in the loop body.
1. Then, evaluate the while conditional expression.
2. If the conditional expression is true, the loop body is executed again.
3. If the conditional expression is false, the loop exits.

Example

The following example demonstrates a simple do-while loop that prints the numbers 1 to 5:

<code class="c">int main() {
  int i = 1;

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

  return 0;
}</code>

This loop will Output:

<code>1 2 3 4 5</code>

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