how to slice of the last char in string javascript code example

Example 1: javascript remove last character from string

var str = 'mystring';

// the character 'g' will be removed
str = str.slice(0, -1);

Example 2: javascript remove last character in a string

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