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 ...
// Longhandlettest: boolean;if(x > 100) {test=true;}else{test=false;}// Shorthandlettest= (x > 10) ?true:false;//或者我们也可以直接用lettest= x > 10;console.log(test); 如果有嵌套的条件,可以这么做。 letx =300,test2 = (x >100) ?...
let x = 1;if (x > 0) {alert( 'Greater than zero!' );} 带&&的代码变体看上去更短。但是if的含义更明显,可读性也更高。 所以建议是根据目的选择代码的结构。需要条件判断就用if,需要与运算就用&&。 !(非) 感叹符号!表示布尔非运算。 语法相当简单: result = !value; 操作符接受一个参数,并按如...
“Expected a number and instead saw ‘{a}’.”:“应该用数字代替’{a}’”, “‘{a}’ should not be greater than ‘{b}’.”:“‘{a}’不应该比’{b}’大”, “‘hasOwnProperty’ is a really bad name.”: “‘hasOwnProperty’是关键字”, “‘{a}’ was used before it was define...
C++ 和 JavaScript 在控制流语句方面也存在差异。在 C++ 中,常用的控制流语句包括 if、while、for 等,例如:if (a > b) { cout << "a is greater than b";} else { cout << "b is greater than a";} while (i < 10) { cout << i << endl;i++;} for (int i = 0; i < 10; i...
Lambda 函数,通常称为“匿名函数”,与普通的 Python 函数相同,只是它可以在没有名称的情况下定义。
if语句 if语句是最基本的决策结构,它执行一个布尔表达式,并根据表达式的真或假来执行相应的代码块。 基本的if结构如下: if (condition) { // 如果条件为真,则执行这里的代码 } 你还可以添加一个else子句来处理条件为假的情况: if (condition) { // 如果条件为真,则执行这里的代码 } else { // 否则,...
>greater thanif (salary > 9000) <less thanif (age < 18) The Boolean value of an expression is the basis for all JavaScript comparisons and conditions. Everything With a "Value" is True Examples 100 3.14 -15 "Hello" "false" 7+1+3.14 ...
} else { // If the counts differ return b[1] - a[1]; // sort by largest count. } }); // Convert the counts to percentages for(let entry of entries) { entry[1] = entry[1] / this.totalLetters*100; } // Drop any entries less than 1% ...
// Define a function named lessby20_others with parameters x, y, and z function lessby20_others(x, y, z) { // Check if x is greater than or equal to 20 and (x is less than y or x is less than z) // Check if y is greater than or equal to 20 and (y is less than x...