}else if(表达式/条件){ 为真的时候执行的代码 }else{ 为假的时候执行的代码 } <script>// 成绩评价if(num>=90&& num<=100){console.log('优秀'); }elseif(num>=80&& num<90){console.log('良好'); }elseif(num>=60&& num<80){console.log('中等'); }e
代码语言:javascript 代码运行次数:0 运行 AI代码解释 if [ ! \( $INT -ge $MIN_VAL -a $INT -le $MAX_VAL \) ]; then echo "$INT is outside $MIN_VAL to $MAX_VAL." else echo "$INT is in range." fi Since all expressions and operators used by test are treated as command argument...
In JavaScript we have the following conditional statements: Useifto specify a block of code to be executed, if a specified condition is true Useelseto specify a block of code to be executed, if the same condition is false Useelse ifto specify a new condition to test, if the first condit...
JavaScript is no different. The if else conditional statement in JavaScript allows the programmer to write code that performs different functions based on various possibilities, in the same way that we perform actions based on different conditions. This tutorial will explain how the “if” and “if...
Example 1: Using if...else // program to check if the number is even or odd// take input from the userconstnumber = prompt("Enter a number: ");//check if the number is evenif(number %2==0) {console.log("The number is even."); ...
在JavaScript中,过多的嵌套if语句会导致代码难以阅读和维护。以下是一些优化嵌套if语句的方法: 1. 使用提前返回(Early Return) 通过提前返回,可以减少嵌套层级,使代码更加扁平化。 代码语言:txt 复制 function checkConditions(a, b, c) { if (a < 0) return false; if (b > 10) return false; if (c ...
// 1.双分支if(表达式1) { 代码块1; }else{ 代码块2; }// 2.多分支if(表达式1) { }elseif(表达式2) { } ...elseif(表达式2) { }else{ } if 嵌套 if(表达式1) {if(表达式2) { }... }... 2、switch语句 switch(表达式) {case值1: 代码块1;break;case值2: 代码块2;break;default:...
Here is how the program will look like with an If – Else if statement: if (age<18) { x="You are not eligible for membership"; } else if (age<51) { x="Welcome, you are accepted as a member"; } else { x="Welcome, you are...
JavaScriptif循环语句 javascript for in循环 项目开发中,不管是建立在哪个框架基础上,对数据的处理都是必须的,而处理数据离不开各种遍历循环。javascript中循环遍历有很多种方式,记录下几种常见的js循环遍历。 一、for循环 for循环应该是最普遍的,使用最多的一种循环遍历方法了,所以也导致其可读性和易维护性比较差,...
JavaScript if...else StatementIn computer programming, the if...else statement is a conditional statement that executes a block of code only when a specific condition is met. For example,Suppose we need to assign different grades to students based on their scores....