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:
for (初始化; 条件; 增量) { // 代码块 }
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:
while (条件) { // 代码块 }
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:
do { // 代码块 } while (条件);
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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