Linked List Why do we need constructor in class node?

#1

I didn’t get the use of constructor node while making class of node.
Please explain

class node{
public:
int d;
node*next;

node(int d){
d=data;
next=NULL;
}
}

#2

constructor is called at the time of object declaration

when you write

node* n = new node(d);

a node n is created with data = d
and next pointer is set to null

this is use of constructor

#3

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