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Question

What is the comma symbol used for?
1) the comma character is used as an action
2) the comma character is used as a separator for lists
3) the comma character is used as a special character
4) the comma character is used as an operation and as a separator

Answer 1

4). As a operator and as a separator..
As an operator :
a = (b, c) ;
first b is evaluated and then c is evaluated and assigned to c. (b, c are any valid expression statements)..
As a separator :
int a, b ;