What do you mean by colon operator(:)?

Question

class MyClass {
public:
int var;
MyClass() {}
MyClass(int a)
: var(a) { } //Why there is colon(:) in between constructor and class member?
};

Answer 1

It's called initializing list. It just initializes your "var" with value of "a".

Answer 2

thanks man.....👍👍👌