Calculator Program using Python

1.Calculator Program using Python 
This program will add,substract,multiply,divide,check prime number,convert celsius to fahrenheit and vice versa, calculate mod ,calculate Sqare root of number with exception handling
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Output of Program->
******************
AryaDrj Calculator
******************
1.Add
2.Subtract
3.Multiply
4.Divide
5.mod
6.Covert celsius to fahrenheit
7.Covert fahrenheit to celsius
8.find the sqaure root
9.Find the number is whether prime or not

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Program->

#THIS PROGRAM IS CREATED BY ARYADRJ
def add(x, y):
   return x + y
def subtract(x, y):
   return x - y
def multiply(x, y):
   return x * y
def divide(x, y):
   return x / y
def mod(x,y):
    return x%y
def cel(fahr):
    return (fahr-32)*5/9
def fahr(cel):
    return  (cel*9/5)+32
def sqaure(x):
    return x**0.5
def prime(num):
    if num>1:
        for i in range (2,num):
            if(num%i)==0:
                print("not a prime")
                break
        else:
            print("prime number")
print("******************")
print("AryaDrj Calculator")
print("******************")
print("1.Add")
print("2.Subtract")
print("3.Multiply")
print("4.Divide")
print("5.mod")
print("6.Covert celsius to fahrenheit")
print("7.Covert fahrenheit to celsius")
print("8.find the sqaure root")
print("9.Find the number is whether prime or not")
print("******************************")
try:
 choice = input("Enter Your choice(| 1| 2 | 3 | 4 | 5 | 6 | 7 | 8 |):")
 if choice == '1':
    num1 = int(input("Enter first number: "))
    num2 = int(input("Enter second number: "))
    print(num1,"+",num2,"=", add(num1,num2))

 elif choice == '2':
    num1 = int(input("Enter first number: "))
    num2 = int(input("Enter second number: "))
    print(num1,"-",num2,"=", subtract(num1,num2))

 elif choice == '3':
    num1 = int(input("Enter first number: "))
    num2 = int(input("Enter second number: "))
    print(num1,"*",num2,"=", multiply(num1,num2))

 elif choice == '4':
    num1 = int(input("Enter first number: "))
    num2 = int(input("Enter second number: "))
    print(num1,"/",num2,"=", divide(num1,num2))
 elif choice=='5':
    num1 = int(input("Enter first number: "))
    num2 = int(input("Enter second number: "))
    print(mod(num1,num2))
 elif choice=='6':
    num1 = int(input("Enter celsius to convert to fahrenheit : "))
    print(cel(num1))
 elif choice=='7':
    num1=int(input("Enter fahrenhiet to convert to celsius :"))
    print(fahr(x,y))
 elif choice=='8':
    num1=int(input("Enter the number :"))
    print(sqaure(num1))
 elif choice=='9':
    num1=int(input("Enter the number to check prime or not : "))
    print(prime(num1))
 else:
    print("Ïncorrect input")
except:
    print("Divide by zero error")