While The insertathead function goes in the first if Condition

#1

While The insertathead function goes in the first if Condition why are not we passing the head pointer by reference again?

#2

@JaveedYara if (head == NULL) means that the linked list is empty, so any insertion will automatically be at head only. if p== 0 this means that we WANT to insert at head.
This is why insertathead() goes in the first if condition.

We are passing “head” by reference only.

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#3

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