How many types of loop statements are there in C language?

The loop statements in C language used to repeatedly execute code blocks are: for loop: used when the number of loops is known, the syntax is for (initialization; condition; increment) {code block}. while loop: used when the number of loops is not known, the syntax is while (condition) {code block}. do-while loop: used when a code block needs to be executed at least once, the syntax is do{code block}while (condition);.

Loop statements in C language

C language provides a variety of loop statements for repeatedly executing code piece. They are:

• for loop: Used to execute a block of code based on a known number of loops.
• while loop: used to execute a block of code based on a condition until the condition is false.
• do-while loop: Similar to while loop, but executes the block of code at least once, even if the condition is false.

for loop

Syntax:

<code class="c">for (初始化; 条件; 增量)
{
    // 代码块
}</code>

Usage: When it is known that it needs to be repeated The exact number of code blocks to use.

Description:

• Initialization: Execute once at the beginning of the loop to initialize the loop variables.
• Condition: Check before each loop iteration to determine whether to continue executing the loop.
• Increment: Executed after each loop iteration and used to update loop variables.

while loop

Syntax:

<code class="c">while (条件)
{
    // 代码块
}</code>

Usage: When you don’t know what is needed Used when repeating a code block an exact number of times.

Description:

• Condition: Check before each loop iteration to determine whether to continue executing the loop.

do-while loop

Syntax:

<code class="c">do
{
    // 代码块
}
while (条件);</code>

Usage: When needed Used when a block of code is executed at least once, even if the condition is false.

Description:

• Condition: Check after each loop iteration to determine whether to continue executing the loop.

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