What's the difference in both?

Question

float area;
float base = 5;
float height = 10;
area = (1/2)*base*height;
OUTPUT: area = 0
area = (0.5)*base*height;
OUTPUT: area = 25
Why so?

Answer 1

1/2 is integer division which returns 0.

Answer 2

to force float division add a float literal at any side (or both) of the division operator:

area = (1.0/2.0)*base*height;