The while loop loops through a block of code as long as a specified condition is true:Syntax while (condition) { // code block to be executed }In the example below, the code in the loop will run, over and over again, as long as a variable (i) is less than 5:...
statement(s)inside while block are executed. Theconditionis checked again. If it evaluates to true, thestatement(s)inside the while loop are executed. This cycle goes on. If at all, the condition evaluates to false, execution comes out of while loop, meaning while loop is completed. And ...
A while statement causes the statement (also called the loop body) to be executed repeatedly until the expression (also called controlling expression) compares equal to zero. The repetition occurs regardless of whether the loop body is entered normally or by a goto into the middle of statement....
Regardless of whetherstatementis a compound statement, it always introduces ablock scope. Variables declared in it are only visible in the loop body, in other words, while(--x>=0)inti;// i goes out of scope is the same as while(--x>=0){inti;}// i goes out of scope ...
C++ while 循环 C++ 循环 只要给定的条件为真,while 循环语句会重复执行一个目标语句。 语法 C++ 中 while 循环的语法: while(condition) { statement(s); } 在这里,statement(s) 可以是一个单独的语句,也可以是几个语句组成的代码块。condition 可以是任意的
#include<iostream>intmain(){int guess;int tries=0;std::cout<<"I have a number 1-10.\n";std::cout<<"Please guess it: ";std::cin>>guess;// Write a while loop here:while(guess!=8&&tries<50){std::cout<<"Wrong guess, try again: ";std::cin>>guess;tries++;}if(guess==8){...
cpp #include <iostream> using namespace std; int main() { bool continueLoop = true; int num; while (continueLoop) { cout << "请输入一个数字(输入0退出循环):"; cin >> num; if (num == 0) { cout << "退出循环!" << endl; continueLoop = fa...
while loop do...while loop In the previous tutorial, we learned about the C++ for loop. Here, we are going to learn about while and do...while loops. C++ while Loop The syntax of the while loop is: while (condition) { // body of the loop } Here, A while loop evaluates the con...
Edit & run on cpp.sh In line 13 it says "recedent", but the while loop is going in the opposite direction. It is a minor thing, but something to consider. Some other minor points: intmain() {. Although it makes no difference to the compiler this is the way I most often see it...
#include <algorithm>#include <iostream>#include <string>intmain(){intj=2;do// compound statement is the loop body{j+=2;std::cout<<j<<' ';}while(j<9);std::cout<<'\n';// common situation where do-while loop is usedstd::strings="aba";std::sort(s.begin(), s.end());dostd...