Illustrative program for User defined function

 Illustrative program

Note:- Due to some encoding error you have to remove quotation mark and type by yourself.

Exchange the values of two variables

def swap(a,b):

    print("Before swap: n1=",a)

    print("Before swap: n2=",b)

    temp=a

    a=b

    b=temp

    print("After swap: n1=",a)

    print("After swap: n2=",b)

    return

n1=input("Enter first number")

n2=input("Enter second number")

swap(n1,n2)

Circulate the values of n variables

def rotate(list, order):

    for i in range (0,order):

        j = len(list)-1

        while j > 0:

            temp = list[j]

            list[j] = list[j-1]

            list[j-1] = temp

            j = j - 1

        print(i, "rotation" , list)

list = [1,2,3,4,5]

rotate(list, 3)

Distance between two points

import math

def distance(x1,y1,x2,y2):

    dx = x2 - x1

    dy = y2 - y1

    d = dx**2 + dy**2

    result=math.sqrt(d)

    return result

Xc=int(input("Enter Xc"))

Yc=int(input("Enter Yc"))

Xp=int(input("Enter Xp"))

Yp=int(input("Enter Yp"))

print(distance(Xc, Yc, Xp, Yp))

To find leap year

def leapyr(yr):

    if yr%4==0 and yr%100!=0 or yr%400==0:

        print ("Leap year")

    else:

        print ("Not a Leap year")

Year= input("Enter a Year:")

leapyr(Year)