Python if else, for loop, and range() Exercise with Solutions

To decide or to control the flow of a program, we have branching and Looping techniques in Python. To perform decision making, we use the if-else statement in Python. To iterate over a sequence of elements we use for loop, and when we want to iterate a block of code repeatedly as long as the condition is true we use the while loop.

We often use a loop, and if-else statement in our program, so a good understanding of it is necessary. This Python loop exercise aims to help Python developers to learn and practice if-else conditions, for loop, range() function, and while loop. All questions are tested on Python 3.

What included in this Python loop exercise?

The exercise contains 10 questions and solutions provided for each question. This loop coding exercise is nothing but Python for loop and while loop assignments to solve, where you can solve and practice different looping techniques programs, questions, problems, and challenges.

This Python loop exercise covers questions on the following topics:

• Python for loop and while loop
• Python nested if-else and nested loop
• Break, continue and pass statement

When you complete each question, you get more familiar with the if-else conditions, for loop, and while loop. Let us know if you have any alternative solutions. It will help other developers.

Practice Questions using Online Code Editor

Exercise Question 1: Print First 10 natural numbers using while loop

Expected output:

0
1
2
3
4
5
6
7
8
9
10

0
i = 0
while i <= 10:
    print(i)
    i += 1

Exercise Question 2: Print the following pattern

1 
1 2 
1 2 3 
1 2 3 4 
1 2 3 4 5

print("Second Number Pattern ")
lastNumber = 6
for row in range(1, lastNumber):
    for column in range(1, row + 1):
        print(column, end=' ')
    print("")

Exercise Question 3: Accept n number from user and calculate the sum of all number between 1 and n including n

For example user given 10 so the output should be 55

sum = 0
n = int(input("Please enter number n"))
for i in range(1, n+1, 1):
    sum += i
print("Sum is: ", sum)

Exercise Question 4: Accept n number from user and print its multiplication table

For example user given 2 so the output should be

2
4
6
8
10
12
14
16
18
20

n = int(input("Enter number to calculate multiplication table"))
for i in range(1, 11, 1):
    product = n*i
    print(product)

Exercise Question 5: Given a list iterate it and display numbers which are divisible by 5 and if you find number greater than 120 stop the loop iteration

list1 = [12, 15, 32, 42, 55, 75, 122, 132, 150, 180, 200]

Expected output:

15
55
75
150

list1 = [12, 15, 32, 42, 55, 75, 122, 132, 150, 180, 200]
for item in list1:
    if (item > 150):
        break
    if(item % 5 == 0):
        print(item)

Exercise Question 6: Given a number count the total number of digits in a number

For example, the number is 75869, so the output should be 5.

num = 75869
count = 0
while num != 0:
    num //= 10
    count+= 1
print("Total digits are: ", count)

Exercise Question 7: Print the following pattern using for loop

5 4 3 2 1 
4 3 2 1 
3 2 1 
2 1 
1

n = 5
k = 5
for i in range(0,n+1):
    for j in range(k-i,0,-1):
        print(j,end=' ')
    print()

Exercise Question 8: Reverse the following list using for loop

list1 = [10, 20, 30, 40, 50]

Expected output:

50
40
30
20
10

list1 = [10, 20, 30, 40, 50]
start = len(list1) - 1
stop = -1
step = -1
for i in range(start, stop, step) :
    print(list1[i])

Exercise Question 9: Display -10 to -1 using for loop

Expected output:

-10
-9
-8
-7
-6
-5
-4
-3
-2
-1

for num in range(-10, 0, 1):
    print(num)

Exercise Question 10: Display a message “Done” after successful execution of for loop

For example, the following loop will execute without any error.

for i in range(5):
    print(i)

So the Expected output should be:

0
1
2
3
4
Done!

for i in range(5):
    print(i)
else:
    print("Done!")