what is string ?

Answer 1

A string is a chain of characters put between quotes (or double quotes). It is the same as an array of characters.

Example:
var s = "Hello world!";
document.write(s); //writes "Hello world!"
document.write('\n'); //skips a line
document.write(s[0]); //writes 'H'

Answer 2

they are variables that contains letters

Answer 3

it is a group of qords used as a single word

Answer 4

it's a set character

Answer 5

string is a part of sentence which is a part of paragraph which is a part of chapter which is apart of book which is a part of course which is a part of degree which is a part of life which is a part of earth which is a part of universe