Javascript remove last character

var str = 'mystring';

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

let str = "Hello Worlds";
str = str.slice(0, -1);

const text = 'abcdef'
const editedText = text.slice(0, -1) //'abcde'

var str = "Hello";
var newString = str.substring(0, str.length - 1); //newString = Hell

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

let str = "hello ";
str = str.substring(str.length - 1);

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

let str = 'mystring';
str = str.slice(0, -1);

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