Increment and Decrement Operators

• unary increment operator (++)
• unary decrement operator (--)‏
• Increment and decrement operators increase and decrease a value stored in a number variable by 1.
• For example, the expression, count=count + 1;//increment the value of count by 1 is equivalent to, count++;
• The increment and decrement operators can be placed before or after an operand.
• When used before an operand, it causes the variable to be incremented or decremented by 1, and then the new value is used in the expression in which it appears.
• For example,

int i = 10;
int j = 3;
int k = 0;
k = ++j + i; //will result to k = 4+10 = 14

• When the increment and decrement operators are placed after the operand, the old value of the variable will be used in the expression where it appears.
• For example,
  int i = 10;
  int j = 3;
  int k = 0;
  k = j++ + i; //will result to k = 3+10 = 13