How To Use Comma Operator In C

Comma works as an operator in program 2.

How to use comma operator in c. 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. In c programming language comma works as a separator and an operator too and its behaviour is little different according to the place where it is used. Each expression must be separated using the comma and are evaluated from left to right. C comma operator the purpose of comma operator is to string together several expressions. In the previous section of operator and expressions i had discussed about sizeof operator in c.

1 a separator 2 an operator. There is a sequence point between these evaluations. The comma operator has the lowest precedence in c or c. Comma operator in programming languages like c c is a binary operator it is represented by token. Today i am going to discuss about comma operator.

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. In a c c program comma is used in two contexts. Suppose a 5 0 b 2 0 c 5 and d 2. 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. The operator can only be used with integers.

When a 9 is divided by b 4 the remainder is 1. The value of a comma separated list of expressions is the value of the right most expre. Precedence of comma operator is least in operator precedence table. The comma operator allows us to place one or more expression where c syntax allows only one expression. In c and c comma can be used in two contexts.

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. While declaration multiple variables and providing multiple arguments in a function comma works as a separator. 1 comma as separator. Comma works just as a separator in program 1 and we get compilation error in this program.