(PP-3)

 3A.Write a program to replace all occurrences of character ‘a’ with ‘$’ sign in a string.

str="My name is SK"

x=str.replace("a","$")

print(x)

        OR

str="My name is SK"

x=str.replace(" ","-")

print(x)


3B.Write a python program to count number of vowels in a string.

str="hello world"

count=0

for i in str:

    if (i=="a" or i=="A" or i=="e" or i=="E" or i=="i" or i=="I" or i=="o" or i=="O" or i=="u" or i=="U"):

        count+=1

print(count)

3C.Write a python program to remove characters of odd index value in string

def odd_values(str):

    result=" "

    for i in range(len(str)):

        if i%2==0:

            result+=str[i]

    return result

print(odd_values("abcdef"))

3D.Write a python program to check whether two strings are anagrams.

def check(s1,s2):

    if (sorted(s1)==sorted(s2)):

        print("The strings are anagrams")

    else:

        print("The strings are not anagrams")

s1="silent"

s2="listen"

check(s1,s2)

3E.Write a python program to count no of lowercase characters in a string.

string="hello world"

count=0

for i in string:

    if(i.islower()):

        count+=1

print("The number of lowercase characters is:",count)

3F.Write a python program to check if string is pangram or not.

import string

def ispangram(str):

    alphabet="abcdefghijklmnopqrstuvwkyz"

    for char in alphabet:

        if char not in str.lower():

            return False

        return True

string="The quick brown fox jumps over the lazy dog"

if(ispangram(string)==True):

    print("Yes")

else:

    print("no")




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