1.示例代码(包括用法和注意事项)
<!DOCTYPE html>
<html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>JS-函数</title>
</head><body><script>//函数的定义和调用//1.具名函数function add (a, b){return a + b;}let result = add(10, 20);console.log(result);// 2.匿名函数(用一个变量名来接收函数，这时候整个变量名就等同于函数名)let add1 = function (a, b){return a + b;}//箭头函数-->（变量名）==>{函数体}let add2 = (a, b) =>{return a + b;}result = add1(1, 2);console.log(result);result = add2(3, 4);console.log(result);let sub = (a, b) =>{return a - b;}let num1 = 9;let num2 = 1;//采用模板字符串的形式进行输出console.log(`${num1}-${num2}=${sub(num1, num2)}`);let mul = function (a, b){return a * b;}console.log(mul(3, 2));</script>
</body></html>2.演示结果
