Lab 5 : Find index of (the first) maximum value in array

def setup():
  n=[1,5,10,4,6,8,7,10,1,1,9,1]
  print("the first index of maximum number = ",firstIndex(n))
  
def firstIndex(n):   
  i=0
  index=0
  max_n=n[0]
  while(i<len(n)):
    
     if(max_n<n[i]):
        max_n=n[i]
        index=i
     i=i+1      
  return index  
    
setup()