Question

1. Write a PYTHON function CommonLetters(mystring) that takes mystring as input and returns the number of letters in mystring that also occur in the string ‘Python’.
2. Using above function, write a program that repeatedly prompts the user for a string and then prints the number of letters in the string that are also in string ‘Python’. The program terminates when the user types an empty string.

Answer 1

Dear Student ,

As per the requirement submitted above , kindly find the below solution.

Here a new python program with name "main.py" is created, which contains following code.

main.py :

def CommonLetters(mystring):
numletters=0 #declaring variable count
for letter in mystring: #using for checking each letter from mystring
if letter == 'P': #checking letter P
numletters = numletters + 1 #increment value of count
elif letter=='y': #checking letter y
numletters = numletters + 1 #increment value of count
elif letter=='t': #checking letter t
numletters = numletters + 1 #increment value of count
elif letter=='h': #checking letter h
numletters = numletters + 1 #increment value of count
elif letter=='o': #checking letter o
numletters = numletters + 1 #increment value of count
elif letter=='n': #checking letter n
numletters = numletters + 1 #increment value of count
return numletters #return number of letters   
  
#declaring variable to store boolean value
flag=True
#using while to ask user string
while flag:
#asking user to enter string
mystring=input("Enter String : ")
if mystring!="" : #if mystring is not empty
#calling method and passing parameter as mystring
print("Number of letters : ",CommonLetters(mystring))
else:
flag=False; #used to break the loop
  

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Screen used for Indentation :

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Output : Compile and Run main.py to get the screen as shown below

Screen 1 :main.py

NOTE : PLEASE FEEL FREE TO PROVIDE FEEDBACK ABOUT THE SOLUTION.