1、if条件判断语句 if条件判断语句是最基本的流程控制语句,可以根据条件表达式的值执行相应的处理。if语句的语法格式如下: AI检测代码解析 if(i > 25){ alert("Great than 25."); //单行语句 }else { alert("Less than or equal to 25."); //代码块中的语句 } 1. 2. 3. 4. 5. if语句是一种...
if( condition ) {//statement}else{//statement (whencondition evaluates tofalse)} 以下流程图说明了 if else 语句。 请参阅以下示例: letx =5;if(x >10) {console.log('x is greater than 10');}else{console.log('x ...
var num = 10; if (num > 0 && num < 10) { console.log("Number is between 0 and 10"); } else if (num >= 10 && num < 20) { console.log("Number is between 10 and 20"); } else { console.log("Number is greater than or equal to 20"); } 在上面的示例中,我们使...
DOM3 新增了两个用于比较节点的方法: isSameNode()和 isEqualNode()。两个方法都接收一个节点参数,如果这个节点与参考节点相同或相等,则返回 true。节点相同,意味着引用同一个对象;节点相等,意味着节点类型相同,拥有相等的属性( nodeName、 nodeValue 等),而且 attributes 和 childNodes 也相等(即同样的位置包含相...
("areNotEqual >> ", areNotEqual,"\n");/// Auto-conversion occurs here. This will throw if a64 does not pack into a JavaScript number with no loss of precision.//varisEqualTo42 = (a64 ==42); host.diagnostics.debugLog("isEqualTo42 >> ", isEqualTo42,"\n");varisLess = (a64...
if(foo ===true) { bar ='hello world'; alert(bar); } /* +---+|if| +---+X X X X +---+ +---+| equal(===) | | if_body | +---+ +---+X X X X X X X X +---+ +---+ +---+ +---+| foo | |true| | assign...
This works the same as log levels, you may set it to debug, info, warning and error and it will only keep breadcrumbs with a level equal or above what this is set to. Valid values are one of ['debug', 'info', 'warning', 'error']. Defaults to info. rg4js('logContentsOfXhr...
<=less than or equal to ?ternary operator Note Comparison operators are fully described in theJS Comparisonschapter. JavaScript String Comparison All the comparison operators above can also be used on strings: Example lettext1 ="A"; lettext2 ="B"; ...
This time, we'll just check if each value is equal to false.Here's the code:let booleanArray = [false, false, false, false]; let allFalse = booleanArray.every(val => val === false); console.log(allFalse); // outputs: true ...
or: letcarName; After the declaration, the variable has no value (technically it isundefined). Toassigna value to the variable, use the equal sign: carName ="Volvo"; You can also assign a value to the variable when you declare it: ...