PY 2(a) – ODD OR EVEN

QUESTION:

Write a program using functions to check whether a number is even or odd.

AIM:

To check whether a number is even or odd using user defined function

CODING:

def oddeven(a):

if(a%2==0):

return 1

else:

return 0

num = int(input(“Eneter a number:”))

if(oddeven(num)==1):

print(“The given number is even”)

elif(oddeven(num)==0):

print(“The given number is odd”)

 OUTPUT:

Enter a number: 7

The given number is odd

Enter a number: 6

The given number is even

RESULT:

The Output was verified successfully

Defining Functions:

• Functions must be defined, to create and use certain functionality.
• There are many built-in functions that comes with the language python (for instance, the print() function), but you can also define your own function.
• When defining functions there are multiple things that need to be noted;
• Function blocks begin with the keyword “def” followed by function name and parenthesis ().
• Any input parameters or arguments should be placed within these parentheses when you define a function.
• The code block always comes after a colon (:) and is indented.
• The statement “return [expression]” exits a function, optionally passing back an expression to the caller.
• A “return “with no arguments is the same as return None.
• To check the given number odd or even.

PY 2(b) – REVERSE THE STRING

QUESTION:

          Write a program to create reverse of the given string. For example, “wel” = “lew“.

AIM:

          To create a reverse of the given string

CODING:

def rev(str1):

str2=”

i=len(str1)-1

while i>=0:

str2+=str1[i]

i-=1

return str2

word=input(“\n Enter a string:”)

print(“\n The mirror of the string is:”, rev(word))

OUTPUT:

Enter a string: wel

The mirror of the string is: lew

RESULT:

The Output was verified successfully

Accessing characters in a String

• Once you define a string, python allocate an index value for its each character.
• These index values are otherwise called as subscript which are used to access and manipulate the strings.
• The subscript can be positive or negative integer numbers.
• The positive subscript 0 is assigned to the first character and n-1 to the last character, where n is the number of characters in the string.
• The negative index assigned from the last character to the first character in reverse order begins with -1.