Difference between revisions of "Count the Vowel"
From CompSciWiki
m |
|||
(13 intermediate revisions by 5 users not shown) | |||
Line 1: | Line 1: | ||
− | {{ | + | {{Template:1010ExtraLabs |
− | | | + | |Chapter_TOC=[[Extra Labs]] |
− | |Problem= | + | |Introduction= In this lab, you will learn how to use String methods in Python. |
− | | | + | ==Problem== |
− | + | Write a Python program that counts the number of vowels in a String given by the user. | |
− | + | |Body= | |
+ | ===Step 1:=== | ||
First, we need 3 variables: | First, we need 3 variables: | ||
− | + | ||
− | + | * input - holding the user's input | |
− | + | * done - control the while loop | |
+ | * vowelCount - count the number of vowel | ||
+ | |||
{{CodeBlock | {{CodeBlock | ||
|Code= | |Code= | ||
Line 16: | Line 19: | ||
}}<br /> | }}<br /> | ||
+ | ===Step 2:=== | ||
+ | Second, we need get the input using raw_input(prompt). | ||
− | |||
{{CodeBlock | {{CodeBlock | ||
|Code= | |Code= | ||
Line 23: | Line 27: | ||
input = raw_input("Enter a sentence") | input = raw_input("Enter a sentence") | ||
− | if input != ' ': | + | if input != '': |
}}<br /> | }}<br /> | ||
− | + | ===Step 3:=== | |
+ | Third, we need to check the vowel. | ||
{{CodeBlock | {{CodeBlock | ||
|Code= | |Code= | ||
Line 35: | Line 40: | ||
}}<br /> | }}<br /> | ||
− | Then we need to use while loop to print the output | + | ===Step 4:=== |
+ | Then we need to use while loop to print the output. | ||
{{CodeBlock | {{CodeBlock | ||
Line 47: | Line 53: | ||
}}<br /> | }}<br /> | ||
− | + | After this, we're done. You should now be able write a complete program that counts the number of vowels in a String given by the user. | |
− | + | ||
− | + | ||
+ | ==SolutionCode== | ||
+ | {{OutputBlock | ||
+ | |Code= | ||
def main(): | def main(): | ||
done = False | done = False | ||
Line 56: | Line 63: | ||
while(!done): | while(!done): | ||
+ | input = raw_input("Enter a sentence") | ||
+ | if input == '': | ||
+ | done = True | ||
+ | else: | ||
+ | #convert input to lower case | ||
+ | input = input.lower() | ||
+ | for char in inputs: | ||
+ | #//check if it's a vowel | ||
+ | if char == 'a' or char == 'e' or char == 'i' or char == 'o' or char == 'u' : | ||
+ | vowelCount++; #increase vowel count | ||
+ | |||
+ | print '\nVowel count: %d\nVowel percentage: %d%%' % \ | ||
+ | (vowelCount, vowelCount * 100 / len(input)) | ||
+ | main() | ||
+ | }} | ||
}} | }} |
Latest revision as of 03:21, 5 April 2012
COMP 1010 Home > Back to Extra Labs
IntroductionIn this lab, you will learn how to use String methods in Python. ProblemWrite a Python program that counts the number of vowels in a String given by the user. |
---|
Step 1:
First, we need 3 variables:
- input - holding the user's input
- done - control the while loop
- vowelCount - count the number of vowel
done = False vowelCount = 0
Step 2:
Second, we need get the input using raw_input(prompt).
#get the input from user input = raw_input("Enter a sentence") if input != '':
Step 3:
Third, we need to check the vowel.
input = input.lower() for char in inputs: #//check if it's a vowel if char == 'a' :
Step 4:
Then we need to use while loop to print the output.
while(!done): (...) #output result print '\nVowel count: %d\nVowel percentage: %d%%' % \ (vowelCount, vowelCount * 100 / leng(input))
After this, we're done. You should now be able write a complete program that counts the number of vowels in a String given by the user.
SolutionCode
def main(): done = False vowelCount = 0 while(!done): input = raw_input("Enter a sentence") if input == '': done = True else: #convert input to lower case input = input.lower() for char in inputs: #//check if it's a vowel if char == 'a' or char == 'e' or char == 'i' or char == 'o' or char == 'u' : vowelCount++; #increase vowel count print '\nVowel count: %d\nVowel percentage: %d%%' % \ (vowelCount, vowelCount * 100 / len(input)) main()