test4.py

# This file contains sample code for various Python concepts such as functions, recursion, and list manipulation.

# Function to calculate the length of a list
def lenList(list):
    length = len(list)
    print("Length of the list is: ", length)

list = [1, 4, 9, 16, 25, 36, 49, 64, 81, 100]
lenList(list)

# Function to print the elements of a list
def printList(list):
    length = len(list)
    for item in list:
        if item == list[length-1]:
            print(item)
        else:
            print(item, end=" ")
printList(list)

#Function to calculate the factorial of a number using while loop
def factorialNumber(n):
    i = 1
    multiply = 1
    while i <= n:
        multiply *= i
        i += 1
    print("Factorial of number", n, "is:", multiply)
factorialNumber(5)

# Function to convert USD to INR
def convertUSDtoINR(usd):
    inr = usd * 82.74
    print(usd, "USD is equal to", inr, "INR")
convertUSDtoINR(100)

# Function to check if a number is odd or even
def oddEvenNumVerify(num):
    if num%2 == 0:
        print(num, "is an even number")
    else:
        print(num, "is an odd number")

num = int(input("Enter a number to check if it is odd or even: "))
oddEvenNumVerify(num)

# Function to calculate the sum of first n numbers using recursion
def sumOfNumber(n):
	if (n == 0):
		return 0
	else:
		return n + sumOfNumber(n-1)
print(sumOfNumber(10))

# Function to print the elements of a list using recursion
def recursivePrintList(list, index):
    if index < len(list):
        print(list[index])
        recursivePrintList(list, index + 1)

recursivePrintList(list, 0)

# Function to print the elements of a list in reverse order using recursion
def reverseRecursivePrintList(list, index):
    if index == -1:
        return
    if index < len(list):
        print(list[index])
        reverseRecursivePrintList(list, index - 1)

length = len(list)
reverseRecursivePrintList(list, length - 1)