Largest Number among Three Numbers:

first_num = int(input("Enter first number: "))
second_num = int(input("Enter second number: "))
third_num = int(input("third first number: "))
result = 0
if first_num > second_num and first_num > third_num:
result = first_num
elif second_num > first_num and second_num > third_num:
result = second_num
else:
result = third_num
print("Biggest number between {},{} and {} is: ".format(first_num, second_num, third_num), result)

Prime Number in python:

import math
number = int(input("Enter a number: "))
i = 2
flag = 0
if number == 1 or number == 2:
print("not prime")
elif number > 0:
while i <= math.sqrt(number):
if number % i == 0:
flag = 1
i = i+1
if flag == 0:
print("prime")
else:
print("Not prime")
else:
print("Enter non digit value")

Reverse a Number:

num = int(input('Enter a number: '))
num_rev = 0
while num > 0:
rem = num % 10
num_rev = num_rev*10 + rem
num = num//10
print(num_rev)

Pattern :

for item in range(1, 4):
for element in range(1, item+1):
print("* ", end=" ")
print()

Calculator in Python:

print("----------")
print("CALCULATOR")
print("----------")

def addition(first, second):
return first + second;


def subtraction(first, second):
return first - second;


def multiplication(first, second):
return first * second;


def division(first, second):
return first / second;


i = 1
choice = 0
while i:
print("-----------------------")
print("1. Addition")
print("2. Subtraction")
print("3. Multiplication")
print("4. Division")
print("5. Press -3 to exit")
print("-----------------------")
print("Enter your choice: ")
choice = int(input())
if choice >= 1 and choice <= 4:
print("--------------------------------------------")
first_num = float(input("Enter first number: "))
second_num = float(input("Enter second number: "))
print("--------------------------------------------")
if choice == 1:
result = addition(first_num, second_num)
elif choice == 2:
result = subtraction(first_num, second_num)
elif choice == 3:
result = multiplication(first_num, second_num)
elif choice == 4:
result = division(first_num, second_num)
print("Result: ", result)
elif choice == -3:
exit()
else:
print("Wrong Choice")