What is The comma operators In C Programming Language?

This operator is used to link the related expression together the expression is separated by the, operator.
An example program showing uses of comma operator:
Output of the program:
Here firstly value 1 is assigned to a, followed by this 2 is assigned to b, and then the result of a+b is assigned to c.
The comma operator is often used in conjunction with a control statement called For.