📘 Lesson · Lesson 72

50 Python Practice Programs

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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

परिचय

50 ज़रूरी Python practice programs — calculations, decisions, loops, patterns और lists। हर एक पूरा है expected output के साथ।

Basic Calculation Programs (गणना)