Table of 2 with a while loop

Write a Python program to print the table of 2 using a while loop.

2 x 1 = 2
2 x 2 = 4
2 x 3 = 6
2 x 4 = 8
2 x 5 = 10
2 x 6 = 12
2 x 7 = 14
2 x 8 = 16
2 x 9 = 18
2 x 10 = 20

Approach

1. Use a counter from 1 to 10.

Solution

i = 1while i <= 10:    print(f"2 x {i} = {2 * i}")    i += 1

2 x 1 = 2
2 x 2 = 4
2 x 3 = 6
2 x 4 = 8
2 x 5 = 10
2 x 6 = 12
2 x 7 = 14
2 x 8 = 16
2 x 9 = 18
2 x 10 = 20

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First 20 natural numbers with while

Write a Python program to print the first 20 natural numbers using a while loop.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 

Approach

1. Count from 1 to 20.

Solution

n = 1while n <= 20:    print(n, end=" ")    n += 1print()

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 

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Print keys and values

Write a Python program to print the keys and values of a dictionary.

{"name": "virat", "sports": "cricket"}

name Virat
sports Cricket

Approach

1. Loop over items() to get both at once.

Solution

player = {"name": "virat", "sports": "cricket"}for key, value in player.items():    print(key, value.capitalize())

name Virat
sports Cricket

Line by line

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Print the values of a dictionary

Write a Python program to print the values of a dictionary, capitalised.

{"name": "virat", "sports": "cricket"}

Virat
Cricket

Approach

1. Loop over values().

Solution

player = {"name": "virat", "sports": "cricket"}for value in player.values():    print(value.capitalize())

Virat
Cricket

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Print the keys of a dictionary

Write a Python program to print the keys of a dictionary using a loop.

{"name": "virat", "sports": "cricket"}

name
sports

Approach

1. Looping over a dict gives its keys.

Solution

player = {"name": "virat", "sports": "cricket"}for key in player:    print(key)

name
sports

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Odd numbers 1-10 into a list

Write a Python program that adds the odd numbers from 1 to 10 into an empty list.

[1, 3, 5, 7, 9]

Approach

1. Append each odd number.

Solution

odds = []for n in range(1, 11):    if n % 2 == 1:        odds.append(n)print(odds)

[1, 3, 5, 7, 9]

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Even numbers 1-10 into a list

Write a Python program that adds the even numbers from 1 to 10 into an empty list.

[2, 4, 6, 8, 10]

Approach

1. Append each even number.

Solution

evens = []for n in range(1, 11):    if n % 2 == 0:        evens.append(n)print(evens)

[2, 4, 6, 8, 10]

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Each character on a new line

Write a Python program to print each character of a string on a new line.

"Sqatools"

S
q
a
t
o
o
l
s

Approach

1. Loop over the string; print() adds a newline after each character.

Solution

for ch in "Sqatools":    print(ch)

S
q
a
t
o
o
l
s

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Display numbers from a list

Write a Python program to display the numbers of a list separated by commas.

[1, 5, 8, 0, 4]

1,5,8,0,4

Approach

1. Print each number with end="," except after the last one.

Solution

numbers = [1, 5, 8, 0, 4]for i, n in enumerate(numbers):    end = "," if i < len(numbers) - 1 else "\n"    print(n, end=end)

1,5,8,0,4

Line by line

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First 20 natural numbers

Write a Python program to print the first 20 natural numbers with a for loop, separated by commas.

1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20

Approach

1. Join the numbers with commas.

Solution

print(",".join(str(n) for n in range(1, 21)))

1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20

Line by line

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