How To Use Comma Operator In C

The value of rightmost expression becomes the value of the overall expression.

How to use comma operator in c. Precedence of comma operator is least in operator precedence table. Comma operator in programming languages like c c is a binary operator it is represented by token. Comma as an operator. In the previous section of operator and expressions i had discussed about sizeof operator in c. 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.

Today i am going to discuss about comma operator. In c and c comma can be used in two contexts. In a c c program comma is used in two contexts. 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. The comma operator allows us to place one or more expression where c syntax allows only one expression.

The operator can only be used with integers. The value of a comma separated list of expressions is the value of the right most expre. Suppose a 5 0 b 2 0 c 5 and d 2. 1 a separator 2 an operator. The comma operator has the lowest precedence in c or c.

There is a sequence point between these evaluations. Comma works as an operator in program 2. When a 9 is divided by b 4 the remainder is 1. 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. C comma operator the purpose of comma operator is to string together several expressions.

Each expression must be separated using the comma and are evaluated from left to right. 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 is a binary operator that evaluates its first operand and then discards the result then evaluates the second operand and returns the value. Comma works just as a separator in program 1 and we get compilation error in this program.