iterate through an array python

list = [1, 3, 6, 9, 12] 
   
for i in list: 
    print(i) 

# Python3 code to iterate over a list 
list = [1, 3, 5, 7, 9] 
   
# Using enumerate()  
for i, val in enumerate(list): 
    print (i, ",",val) 

colors = ["red", "green", "blue", "purple"]
i = 0
while i < len(colors):
    print(colors[i])
    i += 1