The syntax of the else statement is:if (condition) { // block of code // execute this if condition is true } else { // block of code // execute this if condition is false }The if...else statement checks the condition and executes code in two ways:...
Syntax Theifstatement specifies a block of code to be executed if a condition is true: if(condition) { // block of code to be executed if the condition is true } Theelsestatement specifies a block of code to be executed if the condition is false: ...
The if statement is the foundation for the if else statement as well as the “if, else if” statement. The “if” statement allows the programmer to execute a set of instructions if a condition is true. If the condition is false, then the code will not be executed. The syntax of the...
The else if StatementUse the else if statement to specify a new condition if the first condition is false.Syntaxif (condition1) { block of code to be executed if condition1 is true } else if (condition2) { block of code to be executed if the condition1 is false and condition2 is ...
// A conditional statement if (x === 0) { // Is `x` equal to zero? x = 123; } // Defining function `baz` with parameters `a` and `b` function baz(a, b) { return a + b; } 注意等号的两种不同用法: 单个等号(=)用于将一个值赋给一个变量。
if (condition) statement1 [else statement2] 要明白這些事情我們得先從syntax開始講起,基本上程式是透過一系列規定好的語法組成,稱為syntax,它類似於我們人類語言中的文法,不管是中文還是英文。一個程式要遵循著syntax並且由一系列statements組成的。 javascript 直譯器在解析程式碼時對於語法結構,即這些程式碼出現的...
The switch statement is a part of JavaScript's "Conditional" Statements, which are used to perform different actions based on different conditions. Use switch to select one of many blocks of code to be executed. This is the perfect solution for long, nestedif/elsestatements. ...
function factorial(n) { if (n === 0 || n === 1) { return 1; } else { return n * factorial(n - 1); } } 你可以这样计算 1 到5 的阶乘: jsCopy to Clipboard console.log(factorial(1)); // 1 console.log(factorial(2)); // 2 console.log(factorial(3)); // 6 console.lo...
满足条件A则执行A的语句，否则执行B语句，python的if...else...功能更加强大，在if和else之间添加数...
// JavaScript statements include conditionals and loops using the syntax // of C, C++, Java, and other languages. function abs(x) { // A function to compute the absolute value. if (x >= 0) { // The if statement... return x; // executes this code if the comparison is true. ...