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C++ 关键字: while

来自 cppreference.cn
< cpp‎ | keyword
 
 
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[编辑] 用法

  • while 循环:作为循环的声明
  • do-while 循环:作为循环终止条件的声明

[编辑] 示例

#include <iostream>
 
int main() noexcept
{
    int i{3};
 
    // The following 'while' loop statement:
    // 1. (condition) Checks if value of the variable 'i' is greater than zero
    //                and if not, ends the loop execution with end of this point.
    //                Post-decrements the variable 'i' (decreases its value by 1).
    // 2. (statement) Writes out a current value of the variable 'i' to the stdout.
    // 3.             Returns to the point 1 (condition).
 
    while (i --> 0)     // condition: i-- > 0
        std::cout << i; // statement: std::cout << i;
}

输出

210

[编辑] 参见

(since C++17)
(since C++23)
(since C++20)