Pre Increment / Decrement in C

Pre-Increment : y = ++ivar  Steps :

1. Value of ivar is incremented 
2. Then value of ivar is assigned to y

In Short :

• When Prefix (++/–) is used with a variable in an Expression .
• The variable is incremented/decremented by one  then  Expression is evaluated using the original value of variable
• Here a is incremented /decremented before use

Live Example :

#include<stdio.h>void main(){int a,b,x=10,y=10;a = x++;b = ++y;                    // Pre-Incrementedprintf("Value of a : %d",a);printf("Value of b : %d",b);}

Output :

Value of a : 10Value of b : 11

Why Output is 11 in case of Pre-increment : 

1. Pre (before) , Value of y is first incremented i.e y = 11
2. Then y is assigned to b

Incoming search terms:

• c pre decrement for loop (1)
• c programming lesson assignments dennis vargo (1)
• post and pre increment in c programming (1)
• predecrement load in c (1)