Project1.py

# Making user friendly calculator 

# 3 steps to follow for calculator 
# 1. define function 
# 2. user input 
# 3. print result 

# 1. define function operations 

#1. function to add two numbers 
def addition(num1, num2):
    return num1 + num2
#2. function to sub two number 
def subtraction(num1,num2):
    return num1-num2 
#3. function to multiplication two numbers 
def multiplication (num1,num2):
    return num1*num2
#4. function to division two numbers 
def division(num1,num2):
    return(num1/num2)
# 5. function to average two numbers
def average (num1,num2):
    return (num1+num2)/2

# step 2 user input 

print ("please select the operations: \n"\
       "1.addition \n"\
       "2.subtraction \n"\
       "3.multiplication\n"\
       "4.division \n"\
       "5.average \n" )

select = int(input("please select the operation from 1 to 5: "))

number1 = int(input(" Enter a first number"))
number2 = int(input("Enter a second number"))

# step 3 print result 

if select == 1:
    print (number1, "+",number2,"=", \
           addition(number1,number2))
elif select ==2:
    print(number1,"-",number2,"= ", \
          subtraction(number1,number2))
elif select ==3:
    print(number1,"*",number2,"= ", \
           multiplication(number1,number2)) 
elif select ==4:
    print(number1,"/",number2,"= ", \
           division(number1,number2))
elif select ==5:
    print ("(",number1,"+",number2,")","/","2","= ", \
           average(number1,number2))
else:
    print("Invalid operation, Please select operations from 1 to 5!")