JSFiddle - React, Tailwind, and code Playground

by ipr101

JavaScript

var string = "90+*-+80-+/*70"
var result = '';
var arr = string.split(/(\d+)/)
for (i = 0; i < arr.length; i++) {
    if (!isNaN(arr[i])) result = result + arr[i];
    else result = result + arr[i].slice(arr[i].length - 1, arr[i].length);
}
alert(result);