Math Converters in Python

Write a menu-driven program that has the following Mathematics conversion area of the triangle, height in centimeter to feet and inches, find the LCM of two numbers, the sum of the first n natural numbers, and calculate the simple interest and display the result on the screen.

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Program Listing

import math

print();

print("\tMATH CONVERTERS");

print();

print("\t[1] Area of the Triangle");

print("\t[2] Height in Centimeter to Feet and Inches");

print("\t[3] Find LCM of Two Numbers ");

print("\t[4] Sum of First n Natural Numbers");

print("\t[5] Calculate the Simple Interest");

print();

ch=input("\tSelect Your Choice : ")

print();

if(ch=="1"):

    a = int(input("\tEnter first side: "))

    b = int(input("\tEnter second side: "))

    c = int(input("\tEnter third side: "))

    s = (a + b + c) / 2

    area = math.sqrt(s * (s - a) * (s - b) * (s - c))

    print("\tArea of the triangle is: ", round(area, 2))

elif(ch=="2"):

    cm = int(input("\tEnter the height in centimeters:"))

    inches = 0.394 * cm

    feet = 0.0328 * cm

    print("\tThe length in inches", round(inches, 2))

    print("\tThe length in feet", round(feet, 2))

elif(ch=="3"):

    a = int(input("\tEnter the first number:"))

    b = int(input("\tEnter the second number:"))

    if (a > b):

        min1 = a

    else:

        min1 = b

    while (1):

        if (min1 % a == 0 and min1 % b == 0):

           print("\tThe LCM is:", min1)

           break

        min1 = min1 + 1;

elif(ch=="4"):

    n = int(input("\tEnter a number: "))

    sum1 = 0

    while (n > 0):

        sum1 = sum1 + n

        n = n - 1

    print("\tThe sum of first n natural numbers is", sum1)

elif (ch == "5"):

    principle = float(input("\tEnter the principle amount:"))

    time = int(input("\tEnter the time(years):"))

    rate = float(input("\tEnter the rate:"))

    simple_interest = (principle * time * rate) / 100

    print("\tThe simple interest is:", round(simple_interest,2));

else:

    print("\tInvalid Operator. Try Again")

print();

print("\tEND OF PROGRAM");