📘 Lesson · Lesson 40

50 Python Practice Programs with Output

In this lesson: 50 Python practice programs with code and output — numbers, strings, lists, patterns — for school, college and interviews.

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A collection of 50 important Python practice programs covering calculations, decisions, loops, patterns and lists. Each is complete with expected output.

Basic Calculation Programs

1. Add two numbers

a, b = 5, 3
print("Sum =", a + b)  # 8

2. Subtract two numbers

a, b = 10, 4
print("Diff =", a - b)  # 6

3. Multiply two numbers

a, b = 6, 7
print("Product =", a * b)  # 42

4. Divide two numbers

a, b = 10, 4
print("Result =", a / b)  # 2.5

5. Find remainder

a, b = 17, 5
print("Remainder =", a % b)  # 2

6. Area of rectangle

l, w = 8, 3
print("Area =", l * w)  # 24

7. Area of circle

r = 7
print("Area =", 3.14 * r * r)  # 153.86

8. Simple interest

p, r, t = 1000, 5, 2
print("SI =", (p * r * t) / 100)  # 100.0

9. Average of three numbers

a, b, c = 10, 20, 30
print("Avg =", (a + b + c) / 3)  # 20.0

10. Swap two numbers

a, b = 5, 9
a, b = b, a
print("a =", a, "b =", b)  # a = 9 b = 5

If-Else and If-Elif Programs

1. Check even or odd

n = 7
if n % 2 == 0:
    print("Even")
else:
    print("Odd")  # Odd

2. Largest of two numbers

a, b = 12, 20
print(a if a > b else b)  # 20

3. Largest of three numbers

a, b, c = 5, 9, 3
if a >= b and a >= c:
    print(a)
elif b >= c:
    print(b)
else:
    print(c)  # 9

4. Positive, negative or zero

n = -4
if n > 0:
    print("Positive")
elif n < 0:
    print("Negative")
else:
    print("Zero")  # Negative

5. Check pass or fail

marks = 45
if marks >= 33:
    print("Pass")
else:
    print("Fail")  # Pass

6. Grade using if-elif

m = 82
if m >= 90:
    print("A+")
elif m >= 75:
    print("A")
elif m >= 33:
    print("Pass")
else:
    print("Fail")  # A

7. Check leap year

y = 2024
if (y % 4 == 0 and y % 100 != 0) or y % 400 == 0:
    print("Leap")
else:
    print("Not Leap")  # Leap

8. Check vowel or consonant

ch = "e"
if ch in "aeiou":
    print("Vowel")
else:
    print("Consonant")  # Vowel

9. Divisible by 5 and 11

n = 55
if n % 5 == 0 and n % 11 == 0:
    print("Yes")
else:
    print("No")  # Yes

10. Largest using ternary

a, b = 7, 4
print(a if a > b else b)  # 7

Loop Programs

1. Print 1 to 10

for i in range(1, 11):
    print(i, end=" ")  # 1..10

2. Sum of first N numbers

n = 5
print("Sum =", sum(range(1, n + 1)))  # 15

3. Factorial

n, f = 5, 1
for i in range(1, n + 1):
    f *= i
print("Factorial =", f)  # 120

4. Multiplication table

n = 5
for i in range(1, 11):
    print(n, "x", i, "=", n * i)

5. Print even numbers 1-20

for i in range(2, 21, 2):
    print(i, end=" ")  # 2..20

6. Reverse a number

n, rev = 1234, 0
while n > 0:
    rev = rev * 10 + n % 10
    n //= 10
print(rev)  # 4321

7. Sum of digits

n, s = 123, 0
while n > 0:
    s += n % 10
    n //= 10
print("Sum =", s)  # 6

8. Count digits

n, c = 98765, 0
while n > 0:
    c += 1
    n //= 10
print("Digits =", c)  # 5

9. Check prime

n = 13
prime = all(n % i != 0 for i in range(2, n))
print("Prime" if prime else "Not Prime")  # Prime

10. Fibonacci series

a, b = 0, 1
for _ in range(7):
    print(a, end=" ")
    a, b = b, a + b  # 0 1 1 2 3 5 8

Pattern Programs

1. Square of stars

for i in range(4):
    print("* " * 4)

2. Right triangle

for i in range(1, 6):
    print("* " * i)

3. Inverted triangle

for i in range(5, 0, -1):
    print("* " * i)

4. Number triangle

for i in range(1, 6):
    for j in range(1, i + 1):
        print(j, end=" ")
    print()

5. Repeated number triangle

for i in range(1, 6):
    print((str(i) + " ") * i)

6. Right-aligned triangle

for i in range(1, 5):
    print("  " * (4 - i) + "* " * i)

7. Pyramid of stars

n = 4
for i in range(1, n + 1):
    print(" " * (n - i) + "*" * (2 * i - 1))

8. Alphabet triangle

for i in range(1, 6):
    for j in range(i):
        print(chr(65 + j), end=" ")
    print()

9. Diamond pattern

n = 3
for i in range(1, n + 1):
    print(" " * (n - i) + "*" * (2 * i - 1))
for i in range(n - 1, 0, -1):
    print(" " * (n - i) + "*" * (2 * i - 1))

10. Hollow square

n = 4
for i in range(n):
    for j in range(n):
        if i in (0, n - 1) or j in (0, n - 1):
            print("*", end=" ")
        else:
            print(" ", end=" ")
    print()

List (Array) Programs

1. Sum of list

a = [10, 20, 30, 40]
print("Sum =", sum(a))  # 100

2. Largest in list

a = [3, 7, 2, 9, 4]
print("Max =", max(a))  # 9

3. Smallest in list

a = [3, 7, 2, 9, 4]
print("Min =", min(a))  # 2

4. Average of list

a = [10, 20, 30]
print("Avg =", sum(a) / len(a))  # 20.0

5. Reverse a list

a = [1, 2, 3, 4, 5]
print(a[::-1])  # [5, 4, 3, 2, 1]

6. Count even numbers

a = [1, 2, 3, 4, 5, 6]
print("Even =", sum(1 for x in a if x % 2 == 0))  # 3

7. Linear search

a = [5, 8, 12, 3]
key = 12
print("Found at", a.index(key))  # 2

8. Copy a list

a = [1, 2, 3]
b = a.copy()
print(b)  # [1, 2, 3]

9. Sort ascending

a = [5, 2, 8, 1]
a.sort()
print(a)  # [1, 2, 5, 8]

10. Count positive/negative

a = [-1, 2, -3, 4, 5]
p = sum(1 for x in a if x >= 0)
n = len(a) - p
print("Pos =", p, "Neg =", n)  # Pos = 3 Neg = 2

Frequently Asked Questions

How should I practise these Python programs?

Type each program yourself, run it, then change the input and predict the output before running again.

Are these programs useful for practical files?

Yes. They cover the usual practical-file topics: conditions, loops, strings, lists, dictionaries and functions.

Where can I find more advanced Python programs?

See the Python advanced practice programs page with sorting, searching, stack, queue, Pandas and NumPy programs and their real output.

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