It is all about loops in python with some simple examples for the beginners

1. LOOPS IN PYTHON

2. FOR LOOP EXAMPLE 1
 Code:
 for i in range(1, 6):
print(i)
 Output: 1 2 3 4 5

3. FOR LOOP EXAMPLE 2
 Code:
 fruits = ['apple', 'banana', 'mango']
for item in fruits:
print(item)
 Output: apple, banana, mango

4. WHILE LOOP EXAMPLE
 Code:
 num = 1
while num <= 5:
print(num)
num += 1
 Output: 1 2 3 4 5

5. PATTERN PROGRAM 1: SQUARE
 Code:
 for i in range(3):
for j in range(3):
print('*', end=' ')
print()
 Output:
* * *
* * *
* * *

6. PATTERN PROGRAM 2: TRIANGLE
 Code:
 for i in range(1, 6):
print('*' * i)
 Output:
*
**
***
****
*****

7. PATTERN PROGRAM 3: NUMBER PYRAMID
 Code:
 for i in range(1, 6):
for j in range(1, i+1):
print(j, end=' ')
print()
 Output:
1
1 2
1 2 3
1 2 3 4
1 2 3 4 5

8. WORKSHEET – LOOP QUESTIONS
 Solve the following:
 1.Write a for loop to print numbers from 10 to 1.
 2.Write a while loop to print even numbers from 2 to 20.
 3.Write a loop to print each character in the string 'PYTHON'.
 4.Write a program to print a right-angle star triangle.
 5.Write a program using break to stop when number == 5.

9. FOR LOOP TO PRINT NUMBERS FROM 10 TO 1
Code:
for i in range(10, 0, -1):
print(i)

10. WHILE LOOP TO PRINT EVEN NUMBERS
FROM 2 TO 20
num = 2
while num <= 20:
print(num)
num += 2

11. LOOP TO PRINT EACH CHARACTER IN THE
STRING 'PYTHON'
for ch in "PYTHON":
print(ch)

12. PROGRAM TO PRINT A RIGHT-ANGLE STAR
TRIANGLE
for i in range(1, 6):
print("*" * i)

13. PROGRAM USING BREAK TO STOP WHEN
NUMBER == 5
for i in range(1, 11):
if i == 5:
break
print(i)

14. SIMPLE COMPARISON TABLE
Feature For Loop While Loop
When to use?
When number of repeats
is known
When repeats depend on
a condition
Example thought “Repeat 5 times”
“Repeat until the work is
done”
Control Controlled by count Controlled by condition

15. EASY WAY TO REMEMBER
 For loop = Counted loop (You know the count)
 While loop = Conditional loop (It stops only when the condition fails)