Chapter 9

Chapter 9 - User Defined Functions
[Solutions for the book "Cs with Python" 
by Sumita Arora for class 11]

Page 277

Q1) Write a function that takes amount in dollars and dollars to rupee conversion price; it then returns the amount converted to rupees. Create the function in both void and non-void forms.

Solution :

def nonvoiddtor(x,y):     #Nonvoid
    res=x*y
    return res
x=input("Enter the conversion price ")
y=input("Enter amount to be converted ($$) ")
print "The prince in Rupee is : ", voiddtor(x,y)

def voiddtor(x,y):        #Void
    res=x*y
    print "The price converted in Rupee is : ",res
x=input("Enter the conversion price ")
y=input("Enter amount to be converted ($$) ")
nonvoiddtor(x,y)

Q2) Write a function to calculate volume of a box with appropriate default values for its parameters. Your function should have the following input parameters: (a) length of box; (b) width of box; (c)height of box.
Test it by writing complete program to invoke it.

Solution :

def boxvolume(l,b,h):
    l=20.0
    b=25.5
    h=40.0
    res=l*b*h
    print res," is the volume of box. "
x=input("Enter length : ")
y=input("Enter breadth : ")
z=input("Enter height : ")
boxvolume(x,y,z)

Q3) Write a program to have following functions :
(i) a function that takes a number as argument and calculates cube for it. The function does not return a value. If there is no value passed to the function in function call, the function should calculate the cube of 2.
(ii) a function that takes two char arguments and return True if both the arguments are equal otherwise False.
Test bot these function by giving appropriate function call statements.

Solution :

def cuberoot(x=2):
    print x**3, "is the value "
x=input("Enter the no. to calculate cube ")
cuberoot(x)

Part (ii)

def charcomp(a,b):

    if a==b:

        print "True"

    else:

        print "False"

x=raw_input("Enter a character ")

y=raw_input("Enter second character ")

charcomp(x,y)

Ques 4) Write a function that receives two numbers and generates a random number from that range. Using this function, the main program should be able to print three numbers randomly.

Solution :

import random

def myfunc(a,b):

    c=random.randint(a,b)

    print a,c,b

x=input("Enter a number ")

y=input("Enter 2nd number ")

myfunc(x,y)

Ques 5) Write a function that receives two string arguments and checks wether they are same length strings (returns True in this case otherwise false)

Solution :

def stringcomp(a,b):

    if len(a)==len(b):

        print "True"

    else:

        print "False"

x=raw_input("Enter a string ")

y=raw_input("Enter another string ")

stringcomp(x,y)

Ques 6) Write a function namely nthRoot() that receives two parameters x and n and returns the nth root of x. I.e x^1/n

Solution :

def nthRoot(x,n):

    res=x**(1.0/n)

    print res

a=input("Enter x ")

b=input("Enter n ")

nthRoot(a,b)

Ques 7) Write a function that takes a number n and then returns a randomly generated number hacing exactly n digits(not starting with zero) e.g. if n is 2 then function can randomly return a number 10-99 but 07,02 etc are not valid 2 digit no.s

Solution :

import random

def myfunc(x):

    start=int('1'+'0'*(x-1))

    print start

    stop=int('9'*x)

    print stop

    print random.randrange(start,stop+1)

a=input("Enter any no. ")

myfunc(a)

[OR]

from random import randint

def randomdigits(n):

    rangestart=10**(n-1)

    rangeend=(10**n)-1

    print randint(rangestart,rangeend)

x=input("Enter a digit ")

randomdigits(x)

Ques 8) Write a function that takes two numbers and returns the number that has minimum one's digit. 

Solution :

def onesplace(a,b):

    lastdigita=a%10

    lastdigitb=b%10

    if lastdigita

        print a

    else:

        print b

x=input("Enter any number ")

y=input("Enter another number ")

onesplace(x,y)

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