[Solved] Why this is an infinite loop?

Titanium Asks: Why this is an infinite loop?
Why the loop goes on to infinity , I have put limits via n<6 , one more thing , the code prints 111111… . The output that I expect is 12345.

Code:
#include <stdio.h>

//Compiler version gcc  6.3.0

int main()
{
  int n=1;
  do{
    while(n<6)
    printf("%d",n);
    n++;
  }
  while(n<6);

  return 0;
}

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