Why we need double equal sign for numbers when one can do the job?

Question

when we write: if 4+2=4:, this make sense. unless it is a string why would we use: if 4+2==4:
just puzzled.

Answer 1

In the first one you can think of it like you're sure of the answer "2 plus 2 equals 4" there's no questioning in it. But in the latter you're asking "Does 2 plus 2 equals 4?" and the answer will be either TRUE or FALSE.

and in Programming "=" is an assignment operator while "==" is a comparison operator. Like Jan Markus said.

Answer 2

If you use just = in an if-statement, the answer will always be TRUE.
To actually make a comparison you need to use ==.