Why do we use " " to define the can't we use ' ' and if no then please let me the reason behind that.

Question

Like why we write String var = "hello"
And why String var = 'hello' not.

Answer 1

Because char and String are two different data types, and how else is Java supposed to know whether you want a character or string of length 1?

For example, given the methods :

public void foo(String s) { }
public void foo(char c) { }

And the call :

foo('a');

If Strings would be made using single quotes, how would Java know that its a char or a String?

Answer 2

Ok Thank you 👍