For

The for statement is used to execute code many times just like the while statement.

for.py

count = 0

#print('While Loop Start ----')
#while count < 5:
#    count = count + 1
#    print(count)
#print('While Loop End ----')

# index will contain values 0 to 4
print('For Loop Start range(5) ----')
for index in range(5):
    print(index)
print('For Loop End ----')

# index will contain values 1 to 4, 5 is not included
print('For Loop Start range(1,5) ----')
for index in range(1,5):
    print(index)
print('For Loop End ----')

# fruits is actually a list of items
fruits = ["apple", "banana", "cherry"]
for fruit in fruits:
  print(fruit)

print("Done.")

We'll discuss lists, arrays, and collections later.

Output:

For Loop Start range(5) ----
0
1
2
3
4
For Loop End ----
For Loop Start range(1,5) ----
1
2
3
4
For Loop End ----
apple
banana
cherry
Done.

Links

• Beginner's Guide

Exercises (5 mins)

1. Take the times_table.py and convert to use a for loop.

   times_table.py

   count = 0
   
   while count < 5:
       count = count + 1
       print(f'{count} * 2 is {count * 2}')
   
   print("Done.")
   

   Output:

   1 * 2 is 2
   2 * 2 is 4
   3 * 2 is 6
   4 * 2 is 8
   5 * 2 is 10
   Done.