Prefix: the value is incremented/decremented first and then applied.
Postfix: the value is applied and the value is incremented/decremented.
#include<stdio.h> main( ) { int i = 3,j = 4,k; k = i++ + --j; printf("i = %d, j = %d, k = %d",i,j,k); }
i = 4, j = 3, k = 6