In this post, you will learn how to write a Python program to count the total number of consonants present in a string. This type of logical coding question is generally asked in the programming interview. We should be aware that the perfect solution to the most fundamental coding or programming inquiries decides how we perform in an interview. There are several ways to count the total number of consonants present in a given string. Here, we have mentioned most of them-
Using forloop 1
Here is the Python program to count consonants present in a given string using a for loop. When the user entered the string as input, it passed through the for loop statement. If the letter is a consonant, the counter increases.
# Count consonants & vowels in a string using Python
vowels=0
consonants=0
# Enter an input string
user_input = input["Enter a string: "]
# convert string in case insensitive
string = user_input.lower[]
for i in string:
if[i == 'a'or i == 'e'or i == 'i'or i == 'o'or i == 'u':
vowels=vowels+1;
else:
consonants=consonants+1;
print["The number of vowels:",vowels];
print["\nThe number of consonant:",consonants];
Output of the above code -
Enter a string: apple
The number of vowels: 2
The number of consonant: 3
Using forloop 2
Here is the other way to count the total consonants present in a string using a for loop. First, we initialised the consonants with a 0 variable. When the user entered the string as input, we stored it in a variable and applied the lower[] method to make it case insensitive. In programming, the vowels in the uppercase string "AEIOU" count as different characters than the vowels in the lowercase string "aeiou". Next, we have passed the string through the for loop statement and checked for each character, updating the counter accordingly. If the letter is a consonant, the counter increases.
# Count consonants in a string using Python
consonants=0
# Enter an input string
user_input = input["Enter a string: "]
# convert string in case insensitive
string = user_input.lower[]
for i in range[0,len[string]]:
if string[i] not in ['a',"e","i","o","u"]:
consonants = consonants + 1;
print["The number of consonant:",consonants];
Output of the above code -
Enter a string: ostrich is the largest bird
The number of consonants: 21
Using Iterative Method
Here, we have used an iterative method to count total consonants in a string-
# Count consonants in a string using Python
# Define function to check for consonant
def check_consonant[x]:
# convert string in lowercase
x = x.lower[]
return not [x == 'a' or x == 'e' or
x == 'i' or x == 'o' or
x == 'u']
# function to count consonants
def countConsonants[string]:
count = 0
for i in range[len[string]]:
# To check is character is Consonant
if [check_consonant[string[i]]]:
count += 1
return count
# Enter an input string
user_input = input["Enter a string: "]
print["The number of consonants:", countConsonants[user_input]]
Recursive Method
Recursion function is a function that is called itself. In the given example, we have called the recursion function to get the total consonants in a string input. A recursion function continues until some condition is met to prevent it. That's why we use the if statement to break the infinite recursion.
# Program to count consonants
# function to check consonant
def check_consonant[x]:
return not [x == 'a' or x == 'e' or
x == 'i' or x == 'o' or
x == 'u']
# Count total number of consonants from 0 to n-1
def count_consonants[string, n]:
if n == 1:
return check_consonant[string[0]]
return count_consonants[string, n - 1] + check_consonant[string[n-1]]
# Enter an input string
user_input = input["Enter a string: "]
# convert string in case insensitive
string = user_input.casefold[]
print["The number of consonants: ",count_consonants[string, len[string]]]
Output of the above code -
Enter a string: Success is journey
The number of consonants: 12
Related Articles
Python program to count vowels or consonants of the given string
Python program to count vowels or consonants of the given string
Contents
- 1 Python program to count vowels or consonants of the given string
- 1.0.1 Python code to count the vowels and consonants using for loop
- 1.0.2 Python code to count the vowels and consonants using for loop – strlen[] function
- 1.1 Suggested for you
- 1.2 Related posts:
In this article, we will discuss the concept of the Python program to count vowels or consonants of the given string
In this post, we are going to learn how to count the vowels and consonants in the given string in Python programming language
Python code to count the vowels and consonants using for loop
The program allows the user to enter a string thereafter It counts the vowels and consonants of the given string using for loop in Python language
Program 1
#Python program to count vowel or consonant of the given string str=input["Please enter a string as you wish: "]; vowels=0 consonants=0 for i in str: if[i == 'a'or i == 'e'or i == 'i'or i == 'o'or i == 'u' or i == 'A'or i == 'E'or i == 'I'or i == 'O'or i == 'U' ]: vowels=vowels+1;#vowel counter is incremented by 1 else: consonants=consonants+1; #consonant counter is incremented by 1 print["The number of vowels:",vowels]; print["\nThe number of consonant:",consonants];
When the above program is executed, it produces the following result
Please enter a string as you wish: python The number of vowels: 1 The number of consonants: 5
Approach
- Declare and initialize two integer counter variable as int vowels=0 and consonants=0;
- The user asked to enter a string to count vowels and consonants
- A for-loop is used to count total vowels and consonants of the given string
- Use an if statement to test vowel if the test expression is true, vowels become vowels + 1[vowels=vowels+1]
- When the if-statement is false, control moves to else part and executes else part statements
- Finally, the program displays the number of vowels and consonants of the given string.
Python code to count the vowels and consonants using for loop – strlen[] function
The program allows the user to enter a string thereafter It counts the vowels and consonants of the given string using strlen[] function in Python language
Program 2
#Python program to count vowel or consonant of the given string str=input["Please enter a string as you wish: "]; vowels=0 consonants=0 str.lower[]#call the lower function to avoid upper case letter for i in str: if[i == 'a'or i == 'e'or i == 'i'or i == 'o'or i == 'u' ]: vowels=vowels+1; else: consonants=consonants+1; print["The number of vowels:",vowels]; print["\nThe number of consonant:",consonants];
When the above program is executed, it produces the following result
Please enter a string as you wish: Python language The number of vowels: 5 The number of consonants: 10
Approach
- Declare and initialize two integer counter variable as int vowels=0 and consonants=0;
- The user asked to enter a string to count vowels and consonants
- call the str.lower[] string function to change upper case lettersto lower case letters
- A for-loop is used to count total vowels and consonants of the given string using the vowels and consonants variables
- Use an if statement to test vowel if the test expression is true, vowels become vowels + 1[vowels=vowels+1]
- When the if-statement is false, control moves to else part and executes else part statements
- Finally, the program displays the number of vowels and consonants of the given string.
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