how to splice the last 3 characters in js code example

Example 1: remove last character from string js

var str = "Your string"
str = str.slice(0, -1); 
console.log(str)
//returns "Your strin"

Example 2: remove last character from string javascript

let str = "12345.00";
str = str.substring(0, str.length - 1);
console.log(str);