Why we have to use + symbel while writing string...

Answer 1

in print("hello","world") yes
But if want to store it in a variable, you need +

Answer 2

What do you mean exactly?

To combine two strings you can "add" them.
For example:
"hello" + " " + "world"
gives
"hello world"

Answer 3

without +symbel also we can add two string
eg. "hello","world" gives "helllo ,world".

Answer 4

hooo k thakyou😊