C# supports the regular arithmetic operations you learned in your childhood: the plus sign (+) for addition, the minus sign (–) for subtraction, the asterisk (*) for multiplication, and the forward slash (/) for division. The symbols +, –, *, and / are called operators because they "operate" on values to create new values. In the following example, the variable moneyPaid-ToConsultant ends up holding the product of 750 (the daily rate) and 20 (the number of days the consultant was employed):
long moneyPaidToConsultant; moneyPaidToConsultant = 750 * 20;
The values that an operator operates on are called operands. In the expression 750 * 20, the * is the operator, and 750 and 20 are the operands.