What is Precedence of Operators

When number of operators occurs in an expression the operator which is to be evaluated first is judged by applying priority of operators. The arithmetic operators available in C are

+ used for Addition

–  used for Subtraction

* used for Multiplication

/ used for Division

% used for Modulus operation. In other words operator used to remainder after division  

When all this is used in an expression in a C program then the operator priority is applied in the following order namely

* followed by

/ followed by

% followed by

+ and this followed by –

Example to understand the concept of priority of operators is

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main() {
  int a;
  a=5 + 7 – 8 * 10 / 5 % 10;
  printf(“a=%d”,a);
}
The output of the above program is a=6 , This occurs as follows:
a=5 + 6 – 80 / 5 % 10 (since * is operated first)
a=5 + 6 – 16 % 10 (/ is operated)
a= 5 + 7 - 6 (% is calculated)
a= 12 - 6 (+ is operated)
a=6
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