与while循环顶部测试循环条件的for和while循环不同,C编程中的do...while循环检查循环底部的条件。 do...while循环类似于while循环,除了它保证至少执行一次的事实。 语法(Syntax) C编程语言中do...while循环的语法是 - do { statement(s); } while( condition ); 请注意,条件表达式出现在循环的末尾,因此循环中...
do-while 循环是一种后测试循环(also known as exit-controlled loop):首先执行循环体中的语句,之后才评估循环的继续条件。与之对比的是 for 和 while 循环,它们都是先测试循环条件,然后再执行循环体,称为前测试循环(pre-tested loop)。在实际编程中,根据具体需求选择最合适的循环类型非常重要。 二、SYNTAX AND ...
–awk Do while循环称为退出控制循环,而 awk while 循环称为入口控制循环。因为 while 循环首先检查条件,然后决定是否执行主体。但是awk do while循环执行一次主体,然后只要条件为真就重复执行主体。 Syntax:doactionwhile(condition) 即使条件为假,在开始时至少执行一次操作。 2. awk Do While 循环示例:至少打印一次...
C programming has three types of loops. for loop while loop do...while loop In the previous tutorial, we learned about for loop. In this tutorial, we will learn about while and do..while loop. while loop The syntax of the while loop is: while (testExpression) { // the body of the...
The do-while statement lets you repeat a statement or compound statement until a specified expression becomes false. Syntax iteration-statement: do statement while ( expression ) ; The expression in a do-while statement is evaluated after the body of the loop is executed. Therefore, the body ...
The syntax for ado whilestatement is: doloop_body_statementwhile(cond_exp); where: loop_body_statementis any valid C statement or block. cond_expis an expression that is evaluated at the end of each pass through the loop. If the value of the expression is "false" (i.e., compares equ...
C++ while Loop The syntax of the while loop is: while (condition) { // body of the loop } Here, A while loop evaluates the condition If the condition evaluates to true, the code inside the while loop is executed. The condition is evaluated again. This process continues until the conditi...
The do/while loop is a variant of the while loop. This loop will execute the code block once, before checking if the condition is true, then it will repeat the loop as long as the condition is true.Syntax do { // code block to be executed } while (condition); ...
Output of while loop: Output of do-while loop: b: 11 Note that thewhileloop doesn't take any iterations, but thedo-whileexecutes its body once. This is because the looping condition is verified at the top of the loop block in case ofwhile, and since the condition is false, the progr...
The syntax of a do...while loop in C++ is −do { statement(s); } while( condition ); Notice that the conditional expression appears at the end of the loop, so the statement(s) in the loop execute once before the condition is tested....