Loops in python

import time
i=1


while i<10:
    print i
    i=i+1  
   

i=1
while True:
    print "This prints once a minute."
#     time.sleep(5)  # Delay for 1 minute (60 seconds)
    if (i==20):
        break
    i=i+1
    print "incrementing i value by 1: "+ str(i)
       
# num = raw_input("Enter a number :")
# print type(num)      
print "Execute until while loop condition becomes false"
i=1
while i<5:  
    print i  
    i=i+1
else:
    print "FIrst Eg: Else block executed...."
   
print "Second loop: While loop terminated. Condition remains True so else block of While won't be executed.."
i=1
while i<5:
    if(i==3): break
    print i  
    i=i+1
else:
    print "Else block.."
   
Str1= "Venu"

for each_letter in Str1:
    print each_letter


l1= ['v', 1, "30", [1,2,3,4], (9,8,7,6)]
for each in l1:
    print type(each)
   
   
t1=(1,2,3,4,'4')
for every in t1:
    print every
   
print "Length of the tuple: "+  str(len(t1))

t1=(1,2,3,4,'4')
for index in range(len(t1)):
    print t1[index]
   
#Range using for loop and else block..
for i in range(10, 15):
    print i  
else: print "Print else block of for loop"