How can I ask for quadruple number on if statement?

Question

For example :
cout<<"choose your password";
cin>>password;
I want to write here if password that you chooseed is bigger than quadruple ( a number witch have 4 number like👉1111) it would be unable👉if (password>👉...........👈I don't know what should I write here){ cout <<" the password is unable;"}

Answer 1

take password one character at a time in a for loop and have a counter variable like c++ in the loop. only proceed if c==4