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Several ways to use while loop to calculate and print the sum of even numbers from 2 to 100
Several ways to use while loop to calculate and print the sum of even numbers from 2 to 100
Use while loop to calculate and print the sum of even numbers from 2 to 100 (three methods)
1. Loop—while
Syntax: while (condition) {
//Loop body-loop operation//Update loop conditions++/--;
}
##2.continue
Function: Terminate the execution of this cycle and continue the next cycle
<p style="margin-bottom: 7px;"><!doctype html><br/><html lang="en"><br/> <head><br/> <meta charset="UTF-8"><br/> <title>Document</title><br/> <link rel="stylesheet" style="text/css" href=""><br/> <style><br/><br/><br/> </style><br/> </head><br/> <body><br/> <script><br/> 计算打印2——100的偶数和<br/> // 方法1：<br/> function sumOs(){<br/> var os=0;<br/> var i=2;<br/> while(i<=100){<br/> os+=i;<br/> i+=2;<br/> }<br/> console.log(os);<br/> }<br/> sumOs();<br/> <br/> //方法2：<br/> function sumOs(){<br/> var os=0;<br/> var i=1;<br/> while(i<=100){<br/> if(i%2==0){<br/> os+=i;<br/> }<br/> i++;<br/> }<br/> console.log(os);<br/> }<br/> sumOs();<br/> <br/> //方法3：<br/> function sumOs(){<br/> var os = 0;<br/> var i = 1;<br/> while(i<=100){<br/> if(i%2==1){<br/> i++;<br/> continue;<br/> }<br/> os += i;<br/> i++;<br/> }<br/> console.log(os);<br/> }<br/> sumOs();<br/><br/><br/> //扩展：循环从弹窗中录入信息，并且打印，直到输入exit为止<br/> function printMsg(){<br/> while(true){<br/> var msg=prompt("请输入一个字段啊");<br/> if(msg=="exit"){<br/> break;<br/> }else{<br/> console.log(msg);<br/> }<br/> }<br/> }<br/> printMsg();<br/> </script><br/> </body><br/></html><br/></p>The above is the detailed content of Several ways to use while loop to calculate and print the sum of even numbers from 2 to 100. For more information, please follow other related articles on the PHP Chinese website!
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