用java script 求数组的最大值最小值和平均数

Posted 2021-01-06 两颗门牙

let readline = require(`readline-sync`);

console.log(`请输入数组的长度`);

let long = ~~readline.question(``);

let arr = [];

let sum = 0;

let average = 0;

for (let i = 0; i < long; i++) {

console.log(`请输入第` + (i + 1) + `项的值：`);

arr[i] = parseFloat(readline.question(``));

sum += arr[i];

average = parseFloat(sum / 2);

}

console.log(`请选择要执行的操作：1.求最大值 2.求最小值 3.求和 4.求平均数`);

let num = ~~readline.question(``);

arr.sort(function (j, k) { return j - k; });

if (num === 1) {

console.log(`最大值为：` + arr[arr.length - 1]);

} else if (num === 2) {

console.log(`最小值为：` + arr[0]);

}

else if (num === 3) {

console.log(`求和的值为：` + sum);

} else if (num === 4) {

console.log(`平均值为：` + average);

}