nptel

 1)What would happen if we call gcd(m,n) with m positive and n negative in the following definition?

def gcd(m,n):
  if m < n: 
    (m,n) = (n,m)
  if (m % n) == 0:
    return(n)
  else:
    diff = m-n
    return (gcd(max(n,diff),min(n,diff)))