How To Use Comma Operator In C

Comma works as an operator in program 2.

How to use comma operator in c. 1 a separator 2 an operator. 1 comma as separator. In a c c program comma is used in two contexts. The operator can only be used with integers. In c and c comma can be used in two contexts.

In the previous section of operator and expressions i had discussed about sizeof operator in c. Each expression must be separated using the comma and are evaluated from left to right. When a 9 is divided by b 4 the remainder is 1. 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. 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. Comma works just as a separator in program 1 and we get compilation error in this program. Today i am going to discuss about comma operator. The comma operator allows us to place one or more expression where c syntax allows only one expression. While declaration multiple variables and providing multiple arguments in a function comma works as a separator.

The value of a comma separated list of expressions is the value of the right most expre. 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. 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. 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. There is a sequence point between these evaluations.

The value of rightmost expression becomes the value of the overall expression. The comma operator has the lowest precedence in c or c. See this for more details. Comma as an operator.