What is a 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 does comma operator do?

The comma operator ( , ) evaluates each of its operands (from left to right) and returns the value of the last operand. This lets you create a compound expression in which multiple expressions are evaluated, with the compound expression’s final value being the value of the rightmost of its member expressions.

Can we use comma in if statement?

Use a comma after the if-clause when the if-clause precedes the main clause. If I’d had time, I would have cleaned the house. If the main clause precedes the if-clause, no punctuation is necessary. I would have cleaned the house if I’d had time.

What are the use of comma and conditional operator in C?

The comma operator (,) allows you to evaluate multiple expressions wherever a single expression is allowed. The comma operator evaluates the left operand, then the right operand, and then returns the result of the right operand.

Do you put a comma before if necessary?

In general, use a comma after “if necessary”, “when needed”, “if required”, etc. when introducing a sentence. Do not place a comma before “if necessary”, “if needed”, “where required”, etc. in mid-sentence or at the end of the sentence (unless you are using them as interrupters or explanatory notes).

What does a comma mean in C#?

Comma operator in C# can be used as a separator in method argument list. You can also use it is an operator in a for statement.

What is comma and size operator in C?

The Comma operator allows us to place one or more expression where C syntax allows only one expression. Each expression must be separated using the comma ( , ) and are evaluated from left to right. The value of rightmost expression becomes the value of the overall expression.

Is there a comma after if not?

Informal rule: If “if so” means “if it is so” or “if that is so,” it needs one comma if it starts a sentence and two in the middle of a sentence. “If not/if not” follows the same rule.