What is the purpose of the 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); there is a sequence point between these evaluations.

What is comma operator in C++?

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). The comma operator has the lowest precedence of any C operator, and acts as a sequence point.

Is a comma a statement terminator?

In C/C++, when should you use the comma (,) operator instead of the semicolon (;) statement terminator? – Quora. In C/C++ comma (,) is never used as a statement terminator, it won’t compile. So whenever a statement is terminated it is done by using a semi colon(;).

What is a comma operator explain with the help of an example?

Sometimes we assign multiple values to a variable using comma, in that case comma is known as operator. Example: a = 10,20,30; b = (10,20,30); In the first statement, value of a will be 10, because assignment operator (=) has more priority more than comma (,), thus 10 will be assigned to the variable a.

Can we use comma in for loop?

The commas you see in C for loops are not part of the syntax of the for loop specifically. They are just manifestations of the comma operator. Commas are major separators between arguments in function calls and between parameters in function declarations, but semicolons are not used.

What is the comma operator in C programming?

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). The comma operator has the lowest precedence of any C operator, and acts as a sequence point .

Why is the comma the last operator to bind to an expression?

The comma operator has the lowest precedence of all C/C++ operators. Therefore it’s always the last one to bind to an expression, meaning this: Another interesting fact is that the comma operator introduces a sequence point.

Why assignment operator has high precedence over comma operator in C++?

This is because the reason that assignment operator has high precedence over the comma operator. 3) Comma operator in place of a semicolon. We know that in C and C++, every statement is terminated with a semicolon but comma operator also used to terminate the statement after satisfying the following rules.

Why comma operator is not allowed to skip the execution?

With most operators, the compiler is allowed to choose the order of execution and it is even required to skip the execution whatsoever if it does not affect the final result (e.g. false && foo () will skip the call to foo ). This is however not the case for comma operator and the above steps will always happen *.