Java Increments Operators

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Increments Operators

• Post-increment:
  • var++ (var = var +1)
  • var--
• Pre-increment:
  • ++var
  • --var

Pre vs Post-increment:

• In an expression, the post-increment a++ first performs the operation with a, and then increments it by 1. Therefore:

	 
 
int a = 3;
 
int c = a++ // c == 3, a == 4
 
int a = 3;
 
int c = ++a // c == 4, a == 4
 
int a = 4;
 
int c = 3;
 
int z = (a++) - (c--); // z == 1, a == 5, c == 2

In the first example, c is assigned the current value of a, then a is incremented. In the second example, a is incremented first, then its value is assigned to c. In the third example, a is incremented and c is decremented after the subtraction operation.

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