7. Implementing programs using Strings. (reverse, palindrome, character count, replacing characters)

 

7. Implementing programs using Strings. (reverse, palindrome, character count, replacing characters)

REVERSE A STRING

def reversed_string(text):

     if len(text) == 1:

       return text

     return reversed_string(text[1:]) + text[:1]

print(reversed_string("Python Programming!"))

 

PALINDROME

def isPalindrome(s):

    return s == s[::-1]

 

s = input("enter any string :")

ans = isPalindrome(s)

 if ans:

    print(s,"Yes it's a palindrome")

else:

    print(s,"No it's not a palindrome")

CHARACTER COUNT

def count_chars(txt):

            result = 0

            for char in txt:

                        result += 1     # same as result = result + 1

            return result

text=input("enter any string")

print("no.of characters in a string",count_chars(text))

REPLACING CHARACTERS

string = "python is a programming language is powerful"

print(string.replace("p", "P",1))

print(string.replace("p", "P"))

Comments

Post a Comment

Popular posts from this blog

10. Implementing real-time/technical applications using Exception handling. (divide by zero error, voter’s age validity, student mark range validation)

  10. Implementing real-time/technical applications using Exception handling. (divide by zero error, voter’s age validity, student mark range validation) Program a=int(input("Entre a=")) b=int(input("Entre b=")) try:     c = ((a+b) / (a-b)) #Raising Error      if a==b:         raise ZeroDivisionError  #Handling of error  except ZeroDivisionError:      print ("a/b result in 0") else:      print (c)   Output   Enter   a=4 Enter   b=4  a/b result in 0    Voter’s age validity a=int(input("Enter your age")) try:     c = a #Raising Error     if c<18:         raise ValueError #Handling of error except ValueError:     print ("not eligible for voting - enter above 18") else:     print (c)   Student ...
Read more

11. Exploring Pygame tool.

   11. Exploring Pygame tool. Pygame Pygame is a cross-platform set of Python modules which is used to create video games. It consists of computer graphics and sound libraries designed to be used with the Python programming language. Pygame was officially written by  Pete Shinners  to replace PySDL. Pygame is suitable to create client-side applications that can be potentially wrapped in a standalone executable. Pygame Installation Install pygame in Windows Before installing Pygame, Python should be installed in the system, and it is good to have 3.6.1 or above version because it is much friendlier to beginners, and additionally runs faster. There are mainly two ways to install Pygame, which are given below: 1. Installing through pip:  The good way to install Pygame is with the pip tool (which is what python uses to install packages). The command is the following: 1.       py -m pip install...
Read more