What is string

Answer 1

string is a sequence of characters
it can be some word or sentence

why the tag if-statements?

Answer 2

why the massives needed

Answer 3

it is any text beetwen quotation marks (sentence, word, any). For example: $STRING is a variable named: STRING (but it is a variable because first character is $), instead, "hello friend" is one STRING

Answer 4

I didn't understand