Python程序使用给定字符串中的set来计算元音数量
在此程序中，给定用户输入字符串。我们必须计算该字符串中的元音数量。在这里，我们在Python中使用set。Set是可迭代，可变且无重复元素的无序集合数据类型。
示例
Input str1=pythonprogram Output 3
算法
Step 1: first we use one counter variable which is used to count the vowels in the string. Step 2: creating a set of vowels. Step 3: then traverse the every alphabet in the given string. Step 4: if alphabet is present in the vowel set then counter incremented by 1. Step 5: After the completion of traversing print counter variable.
范例程式码
# Program to count vowel in
# a string using set
def countvowel(str1):
c = 0
# Creating a set of vowels
s="aeiouAEIOU"
v = set(s)
# Loop to traverse the alphabet
# in the given string
for alpha in str1:
# If alphabet is present
# in set vowel
if alpha in v:
c = c + 1
print("No. of vowels ::>", c)
# Driver code
str1 = input("Enter the string ::>")
countvowel(str1)输出结果
Enter the string ::>pythonprogram No. of vowels ::> 3