Arithmetic operations on two numbers

Python Practice › Basic Programs › Program 40

Arithmetic operations on two numbers

EasyBasic Programs · 40 of 40

Write a Python program to perform all the basic arithmetic operations on two numbers.

Input

a = 17, b = 5

Output

Addition        22
Subtraction     12
Multiplication  85
Division        3.4
Floor division  3
Remainder       2
Power           1419857

Approach

Apply each arithmetic operator and print the results in a table.

Solution

Python

a, b = 17, 5operations = {    "Addition": a + b,    "Subtraction": a - b,    "Multiplication": a * b,    "Division": a / b,    "Floor division": a // b,    "Remainder": a % b,    "Power": a ** b,}for name, value in operations.items():    print(f"{name:<15} {value}")

Output

Addition        22
Subtraction     12
Multiplication  85
Division        3.4
Floor division  3
Remainder       2
Power           1419857

Line by line

Lines 2-10

A dictionary maps each operation’s name to its result.

Lines 11-12

The loop prints each pair; :<15 pads the name to 15 characters so the values line up.

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#36EasyHCF (GCD) of two numbers #37EasyLCM of two numbers #38EasySquare root of a number #39EasyVolume of a sphere

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Volume of a sphere

Python Practice › Basic Programs › Program 39

Volume of a sphere

EasyBasic Programs · 39 of 40

Write a Python program to calculate the volume of a sphere. Volume = 4/3 × π × r³.

Input

r = 6

Output

Volume: 904.78

Approach

Apply the formula with math.pi.

Solution

Python

import math r = 6volume = 4 / 3 * math.pi * r ** 3print("Volume:", round(volume, 2))

Output

Volume: 904.78

Line by line

Line 4

The radius is cubed (r ** 3).

Note

The original exercise wrote the formula as 4/3 × π × r² with π = 3. The correct formula uses r³, and math.pi gives an accurate π.

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Square root of a number

Python Practice › Basic Programs › Program 38

Square root of a number

EasyBasic Programs · 38 of 40

Write a Python program to find the square root of a number using the math library.

Input

144, 2

Output

Approach

Use math.sqrt(), or math.isqrt() for a whole-number root.

Solution

Python

import math print(math.sqrt(144))print(round(math.sqrt(2), 4))print(math.isqrt(150))print(16 ** 0.5)

Output

Line by line

Line 3

sqrt always returns a float.

Line 5

isqrt returns the whole-number part of the root (12 for 150).

Line 6

Raising to the power 0.5 also gives the square root.

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#39EasyVolume of a sphere #40EasyArithmetic operations on two numbers

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LCM of two numbers

Python Practice › Basic Programs › Program 37

LCM of two numbers

EasyBasic Programs · 37 of 40

Write a Python program to find the LCM (lowest common multiple) of two numbers.

Input

12 and 18

Output

LCM: 36

Approach

LCM × HCF = a × b, so LCM = a × b // HCF.

Solution 1: using the HCF

Python

import math a, b = 12, 18lcm = a * b // math.gcd(a, b)print("LCM:", lcm)

Output

LCM: 36

Line by line

Line 4

12 × 18 = 216 and the HCF is 6, so the LCM is 36.

Solution 2: math.lcm

Python

import mathprint(math.lcm(12, 18), math.lcm(4, 6, 10))

Output

36 60

Line by line

Line 2

math.lcm (Python 3.9+) accepts any number of values.

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HCF (GCD) of two numbers

Python Practice › Basic Programs › Program 36

HCF (GCD) of two numbers

EasyBasic Programs · 36 of 40

Write a Python program to find the HCF (highest common factor, also called GCD) of two numbers.

Input

48 and 36

Output

HCF: 12

Approach

Euclid’s algorithm: replace (a, b) with (b, a % b) until b is 0; then a is the HCF.

Solution 1: Euclid’s algorithm

Python

a, b = 48, 36while b:    a, b = b, a % bprint("HCF:", a)

Output

HCF: 12

Line by line

Line 2

The loop runs while b is not zero.

Line 3

(48, 36) → (36, 12) → (12, 0), so the HCF is 12.

Solution 2: math.gcd

Python

import mathprint(math.gcd(48, 36))

Output

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#37EasyLCM of two numbers #38EasySquare root of a number #39EasyVolume of a sphere #40EasyArithmetic operations on two numbers

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Sum of natural numbers

Python Practice › Basic Programs › Program 35

Sum of natural numbers

EasyBasic Programs · 35 of 40

Write a Python program to find the sum of the first n natural numbers (1 + 2 + … + n).

Input

n = 100

Output

Approach

Loop and add, or use the formula n(n + 1)/2.

Solution 1: loop

Python

n = 100total = 0for i in range(1, n + 1):    total += iprint(total)

Output

Line by line

Lines 3-4

Adds 1, 2, 3 … 100 one at a time.

Solution 2: formula

Python

n = 100print(n * (n + 1) // 2, sum(range(1, n + 1)))

Output

5050 5050

Line by line

Line 2

The formula gives the answer instantly; // keeps it an integer. sum(range(...)) is the one-line loop version.

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#36EasyHCF (GCD) of two numbers #37EasyLCM of two numbers #38EasySquare root of a number #39EasyVolume of a sphere

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Convert decimal to binary

Python Practice › Basic Programs › Program 34

Convert decimal to binary

EasyBasic Programs · 34 of 40

Write a Python program to convert a decimal number to binary.

Input

Output

Approach

Repeatedly divide by 2 and collect the remainders, then read them in reverse. Or use bin().

Solution 1: by hand

Python

n = 25bits = ""while n > 0:    bits = str(n % 2) + bits    n //= 2print(bits)

Output

Line by line

Line 4

The remainder after dividing by 2 is the next binary digit; adding it in front reverses the order for us.

Line 5

Integer division moves to the next digit.

Solution 2: built-in

Python

print(bin(25), format(25, "b"), int("11001", 2))

Output

0b11001 11001 25

Line by line

Line 1

bin() adds the 0b prefix, format(n, "b") does not, and int(text, 2) converts back.

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#35EasySum of natural numbers #36EasyHCF (GCD) of two numbers #37EasyLCM of two numbers #38EasySquare root of a number

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Get the current date and time

Python Practice › Basic Programs › Program 33

Get the current date and time

EasyBasic Programs · 33 of 40

Write a Python program to get the current date (and time).

Output

Today: 2026-11-02
Year: 2026 Month: 11 Day: 2
Weekday: Monday

Approach

Use date.today() for the date and datetime.now() for date and time.

Solution

Python

from datetime import date, datetime print("Today:", date.today())now = datetime.now()print("Year:", now.year, "Month:", now.month, "Day:", now.day)print("Weekday:", now.strftime("%A"))

Output

Today: 2026-11-02
Year: 2026 Month: 11 Day: 2
Weekday: Monday

Line by line

Line 3

Prints the date in ISO format, year-month-day.

Line 5

A datetime exposes each part as an attribute.

Line 6

%A gives the full weekday name.

Note

The output shows the date on which this page was built.

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#34EasyConvert decimal to binary #35EasySum of natural numbers #36EasyHCF (GCD) of two numbers #37EasyLCM of two numbers

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Random string of a given length

Python Practice › Basic Programs › Program 32

Random string of a given length

EasyBasic Programs · 32 of 40

Write a Python program to generate a random string of a specific length.

Input

length = 10

Output

u8jzPde0Ig 10

Approach

Build a pool of characters with the string module.
Pick characters at random and join them.

Solution

Python

import randomimport string random.seed(7)length = 10pool = string.ascii_letters + string.digitspassword = "".join(random.choice(pool) for _ in range(length))print(password, len(password))

Output

u8jzPde0Ig 10

Line by line

Line 6

ascii_letters is a-z and A-Z; adding digits gives 62 possible characters.

Line 7

random.choice picks one character per position and join builds the string.

Tip

For passwords and tokens use the secrets module (secrets.token_urlsafe(16)), which is cryptographically secure. random is fine for test data.

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#33EasyGet the current date and time #34EasyConvert decimal to binary #35EasySum of natural numbers #36EasyHCF (GCD) of two numbers

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Generate random numbers

Python Practice › Basic Programs › Program 31

Generate random numbers

EasyBasic Programs · 31 of 40

Write a Python program to generate random numbers.

Output

74
[1, 4, 4, 5, 1]
1.706
[32, 18, 42, 11, 3, 34]

Approach

Use the random module: randint for whole numbers, random and uniform for decimals.
Seed the generator to make the output repeatable.

Solution

Python

import random random.seed(10)print(random.randint(1, 100))print([random.randint(1, 6) for _ in range(5)])print(round(random.uniform(1.5, 2.5), 3))print(random.sample(range(1, 50), 6))

Output

74
[1, 4, 4, 5, 1]
1.706
[32, 18, 42, 11, 3, 34]

Line by line

Line 3

A fixed seed makes the sequence repeat on every run. Remove it to get different numbers each time.

Line 4

randint(1, 100) includes both ends.

Line 5

Five dice rolls.

Line 6

uniform returns a float between the two values.

Line 7

sample picks 6 different numbers, like a lottery draw.

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#32EasyRandom string of a given length #33EasyGet the current date and time #34EasyConvert decimal to binary #35EasySum of natural numbers

← All 40 Basic Programs