数字千分位增加标点
作者：互联网
参考:https://www.jianshu.com/p/928c68f92c0c
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<script>
let num = 1234567;
let arr = num.toString().split('').reverse()
console.log(arr, '==arr')
let num1 = 8 - arr.length
if (num1) {
for (let i = 0; i < num1; i++) {
arr.push('0')
}
}
let arrtotal = []
for (let j = 0; j < arr.length; j++) {
if (j % 3 == 0 && j != 0) {
arrtotal.push(',')
}
arrtotal.push(arr[j])
}
console.log(arrtotal.reverse().join(''))
</script>
<script>
function numFormat(num) {
num = num.toString().split("."); // 分隔小数点
var arr = num[0].split("").reverse(); // 转换成字符数组并且倒序排列
var res = [];
for (var i = 0, len = arr.length; i < len; i++) {
if (i % 3 === 0 && i !== 0) {
res.push(","); // 添加分隔符
}
res.push(arr[i]);
}
res.reverse(); // 再次倒序成为正确的顺序
if (num[1]) { // 如果有小数的话添加小数部分
res = res.join("").concat("." + num[1]);
} else {
res = res.join("");
}
return res;
}
var a = 1234567894532;
var b = 673439.4542;
console.log(numFormat(a)); // "1,234,567,894,532"
console.log(numFormat(b)); // "673,439.4542"
</script>
<script>
// 2.方法二
// 使用JS自带的函数 toLocaleString
var a = 1234567894532;
var b = 673439.4542;
console.log(a.toLocaleString()); // "1,234,567,894,532"
console.log(b.toLocaleString()); // "673,439.454" （小数部分四舍五入了）
</script>
<script>
function numFormat(num) {
var res = num.toString().replace(/\d+/, function (n) { // 先提取整数部分
return n.replace(/(\d)(?=(\d{3})+$)/g, function ($1) {
return $1 + ",";
});
})
return res;
}
var a = 1234567894532;
var b = 673439.4542;
console.log(numFormat(a)); // "1,234,567,894,532"
console.log(numFormat(b)); // "673,439.4542"
</script>
</body>
</html>
标签：arr,console,数字,res,千分,标点,num,var,log 来源： https://blog.csdn.net/qq_42374676/article/details/120654438