Pre and Post Increment and Decrement

Pre and Post Increment and Decrement

 

++x is pre-increment  and --x is pre-decrement

x++ is post-increment and x-- is post-decrement

 

With ++x and --x:  means x is incremented BEFORE being used.

With x++ and x--:  means x is incremented AFTER being used.

 

Examples

 

number a = 1;

number b;

b = ++a;

print(b);               // 2

print(a);               // 2

b = --a;

print(b);               // 1

print(a);               // 1

 

number c = 3;

number d;

d = c++;

print(d);                  // 3

print(c);                  // 4

d = c--;

print(d);                 // 4

print(c);                 // 3