Enough Function

Question

Can someone please explain to me how it can print 4 on the screen when we put 9 in the function enough()? I need to to understand this. This is the code
https://code.sololearn.com/cCBdwRtJ7fr7/?ref=app

Answer 1

1+2=3
3+3=6
6+4=10

Loop breaks and 4 us returned.