function.txt

Q.1- Create a function to calculate the area of a circle by taking radius from user.
def area():
    r=int(input("enter radius"))
    area=3.14*r*r
    print("Area is:%d"%(area))

area()    
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Q.2- Write a function “perfect()” that determines if parameter number is a perfect number. Use this function in a program that determines and prints all the perfect numbers between 1 and 1000. 
[An integer number is said to be “perfect number” if its factors, including 1(but not the number itself), sum to the number. E.g., 6 is a perfect number because 6=1+2+3].
 def perfect(n):
    s=0
    for i in range(1,n):
        if(n%i==0):
            s+=i
    if(s==n):
         print("perfect number")
    else:
         print("not perfect")

n=int(input("enter number"))
perfect(n)    
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Q.3- Print multiplication table of 12 using recursion.
def power(n,m):
    if(m==0):
        return 1
    else:
        return(n*power(n,m-1))
print(power(2,3))    
        

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Q.4- Write a function to calculate power of a number raised to other ( a^b ) using recursion.
def power(n,m):
    if(m==0):
        return 1
    else:
        return(n*power(n,m-1))
print(power(2,3))    
        
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Q.5- Write a function to find factorial of a number but also store the factorials calculated in a dictionary

def fact(m):
    fac=1
    for i in range(1,m+1):
        fac=fac*i
    return fac

print("Factorial of 5")
print(fact(5))
d={"fact of ":fact(5)}
print(d)