When I put other number than 0 the program successful but in the course they say that the program can't matter if you put other0

Question

I think to return value.

Answer 1

Okay, cool, but if you got a problem, please specify it, also, a code would be helpful

Answer 2

I talking to return value

Answer 3

are you talking about the return value or what???

Answer 4

It doesn't matter what the return value is, because it won't be used. But, it definitely should be an integer

Answer 5

On Unix systems (where C comes from), the return value is used extensively.

For example, if a script uses your Program A to extract some data, and program B to modify it, if the program A returns a non-zero value, the script will not run program B, because there is no data for it to use.

On Windows, the return value is generally ignored.