Using Python version 2.7, design a program that prompts the user to enter a stri
ID: 3533775 • Letter: U
Question
Using Python version 2.7, design a program that prompts the user to enter a string.The program should then display the number of vowels and the number of consonants in the string. I am absolutely lost and don't even know how to start, any assistance would be appreciated.
I will also provide the pseudocode that was provided by the teacher, if it helps at all:
// main module
Module main()
// Variables
Declare String str
Declare Integer index
Declare Integer vowels = 0
Declare Integer consonants = 0
// Get input from the user.
Display "Enter a string."
Input str
// Scan the string counting vowels and consonants.
For index = 0 To length(str) - 1
If isVowel(str(index)) Then
Set vowels = vowels + 1
Else If isConsonant(str(index)) Then
Set consonants = consonants + 1
End If
End For
// Display the results.
Display "Vowels: " , vowels
Display "Consonants: " , consonants
End Module
// The isVowel function returns True if the argument
// is a vowel, or False otherwise.
Function Boolean isVowel(String ch)
Declare Boolean status // Flag
// Convert the argument to uppercase.
ch = toUpper(ch)
// Is ch a vowel?
If ch == "A" OR ch == "E" OR
ch == "I" OR ch == "O" OR
ch == "U" Then
Set status = True
Else
Set status = False
End If
Return status
End Function
// The isConsonant function returns True if the argument
// is a consonant, or False otherwise.
Function Boolean isConsonant(String ch)
Declare Boolean status // Flag
// Is ch a letter?
If isLetter(ch) Then
// Is ch not a vowel?
If NOT isVowel(ch) Then
Set status = True
Else
Set status = False
End If
Else
Set status = False
End If
Return status
End Function
Explanation / Answer
def main():
input_str=''
index=0
vowels = 0
consonants = 0
input_str=raw_input('Input a string:')
for x in input_str:
if isVowel(x):
vowels = vowels + 1
elif isConsonant(x):
consonants = consonants + 1
print( "Vowels: " +str(vowels))
print ("Consonants: " +str(consonants))
def isVowel(ch):
status=True
ch = ch.upper()
if ( ch == "A" or ch == "E" or ch == "I" or ch == "O" or ch == "U"):
status = True
else:
status = False
return status
def isConsonant(ch):
status=True
if ch.isalpha():
if not( isVowel(ch) ):
status = True
else:
status = False
else:
status = False
return status
if __name__ == '__main__':
main()
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