How To Use Comma Operator In C

In the c and c programming languages the comma operator represented by the token is a binary operator that evaluates its first operand and discards the result and then evaluates the second operand and returns this value and type.

How to use comma operator in c. In a c c program comma is used in two contexts. While declaration multiple variables and providing multiple arguments in a function comma works as a separator. Comma operator in programming languages like c c is a binary operator it is represented by token. Comma as an operator. Comma works just as a separator in program 1 and we get compilation error in this program.

1 comma as separator. Comma works as an operator in program 2. Suppose a 5 0 b 2 0 c 5 and d 2. The comma operator allows us to place one or more expression where c syntax allows only one expression. The comma operator is a binary operator that evaluates its first operand and then discards the result then evaluates the second operand and returns the value.

The comma operator represented by the token is a binary operator that evaluates its first operand and discards the result it then evaluates the second operand and returns this value and type. See this for more details. In the previous section of operator and expressions i had discussed about sizeof operator in c. Precedence of comma operator is least in operator precedence table. Then in c programming either one of the operands is a floating point number a b 2 5 a d 2 5 c b 2 5 both operands are integers c d 2.

In c and c comma can be used in two contexts. Today i am going to discuss about comma operator. The value of rightmost expression becomes the value of the overall expression. When a 9 is divided by b 4 the remainder is 1. Each expression must be separated using the comma and are evaluated from left to right.

The value of a comma separated list of expressions is the value of the right most expre. The operator can only be used with integers. C comma operator the purpose of comma operator is to string together several expressions. The comma operator has the lowest precedence in c or c.