#python program to calculate area of a square

#take side of square as input from user

side=input("Enter length of side of square: ")

try:

    side=float(side)

    #calculate area of a square

    area = side * side

    #print area of a square

    print("---output---")

    print("area of a square with side %0.2f is %0.2f"%(side,area))

except:

    print("---error---")

    print("please enter a valid length")



 

Enter length of side of square: 4

---output---

area of a square with side 4.00 is 16.00

 

Enter length of side of square: length

---error---

please enter a valid length