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In previous articles, we have learned the basic concepts of Python Functions. In this article, let us do some practice programs on Python functions. These are some basic programs to clear the concept.

Python program to print the string using the function

def display():
    #return
    print("In Display function")
print("In Main function")
display()
print("Back to Main")
input()

Python program to check the difference between a local and global variable

a=5#global
def display():
    a=10#local
    print("In display function a = ",a)
def show():
    a=20#local
    print("In Show function a = ",a)
def function():
    global a
    a=30
    print("In function a = ",a)
display()
show()
function()
input()

Addition of two number without parameter

def add():
    print("Enter the two Numbers ")
    a=int(input())
    b=int(input())
    sum=a+b
    print("Sum = ",sum)
add()
input()

Addition of two number with parameter

def add(x,y):
    sum=x+y
    print("Sum = ",sum)
print("Enter the two Numbers ")
a=int(input())
b=int(input())
add(a,b)
input()

Function with return value without parameter

def add():
    print("Enter the two Numbers ")
    a=int(input())
    b=int(input())
    sum=a+b
    return sum

print("Sum = ",add())
input()

Function with return value with a parameter

def add(x,y):
    sum=x+y
    return sum
print("Enter the Two Numbers : ")
a=int(input())
b=int(input())
c=add(a,b)
print("Sum = ",c)
input()

Function return more than one value

def swap(x,y):
    temp=x
    x=y
    y=temp
    return x,y
print("Enter the Two Numbers : ")
a=int(input())
b=int(input())
print("Before Calling Swap function a = ",a," and b = ",b)
a,b=swap(a,b)
print("After Calling Swap function a = ",a," and b = ",b)
input()

Function call by value

def swap(x,y):
    temp=x
    x=y
    y=temp
print("Enter the Two Numbers : ")
a=int(input())
b=int(input())
print("Before Calling Swap function a = ",a," and b = ",b)
swap(a,b)
print("After Calling Swap function a = ",a," and b = ",b)
input()

Program to create the calculator

def add(x,y):
    sum=x+y
    print(a," + ",b," = ",sum)
def sub(x,y):
    s=x-y
    print(a," - ",b," = ",s)
def mul(x,y):
    m=x*y
    print(a," * ",b," = ",m)
def div(x,y):
    d=x/y
    print(a," / ",b," = ",d)
def floor_div(x,y):
    d=x//y
    print(a," // ",b," = ",d)
print("Enter the Two Numbers : ")
a=int(input())
b=int(input())
print("Press + for Addition")
print("Press - for Subtraction")
print("Press * for multiplication")
print("Press / for Division")
print("Press // for Floor Division")
ch=input()
if(ch=='+'):
    add(a,b)
elif(ch=='-'):
    sub(a,b)
elif(ch=='*'):
    mul(a,b)
elif(ch=='/'):
    div(a,b)
elif(ch=='//'):
    floor_div(a,b)
else:
    print("Invalid Choice")

Python recursion function

def display():
    global a
    a=a+1
    print("In Display function")
    if(a<5):
        display()
    print("Back to display")
a=0
print("In Main")
display()
print("Back to main")
input()

Program to get the factorial using recursion

def fact(num):
    if(num<=0):
        return 1
    else:
        return num*fact(num-1)
n=int(input('Enter the number to get Factorial '))
f=fact(n)
#print("Factorial of ",n," is = ",f)
print("Factorial of %d is = %d"%(n,f))
input()

That’s it Folks on this topic. Let us know your comments on this article in the comment box below. Kindly like our facebook page, follows us on twitter and subscribe to our YouTube channel for latest updates.

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