Kotlin Program to Count the Number of Vowels and Consonants in a Sentence

In this article, we will understand how to count the vowels and consonants in Kotlin. Alphabets that include the following are called Vowels −

‘a’ ‘e’ ‘i’ ‘o’ ‘u’

All other alphabets are called Consonants.

Suppose our input is −

Hello, my name is Charlie

The desired output would be −

The number of vowels in the statement is: 8
The number of vowels in the Consonants is: 12

Algorithm

• Step 1 − Start

• Step 2 − Declare two integers: vowelsCount, consonantsCount and a string input

• Step 3 − Define the values

• Step 4 − Run a for-loop, check each letter whether it is a consonant or a vowel. Increment the respective integer. Store the value.

• Step 5 − Display the result

• Step 6 − Stop

Example 1

In this example, we will count the Number of Vowels and Consonants in a Sentence using a for loop. First, declare and set the input string

var myInput = "Hello, my name is Charlie"

Now, set the variables for vowels and consonants and initialize to zero

var vowelsCount = 0
var consonantsCount = 0

Count the vowels and consonants

myInput = myInput.toLowerCase()
for (i in 0..myInput.length - 1) {
   val ch = myInput[i]
   if (ch == 'a' || ch == 'e' || ch == 'i'
      || ch == 'o' || ch == 'u') {
      ++vowelsCount
   } else if (ch in 'a'..'z') {
      ++consonantsCount
   }
}

Let us now see the complete example to count the number of vowels and consonants using a for loop

fun main() {
   var myInput = "Hello, my name is Charlie"
   var vowelsCount = 0
   var consonantsCount = 0
   println("The statement is defined as: $myInput ")
   myInput = myInput.toLowerCase()

   for (i in 0..myInput.length - 1) {
      val ch = myInput[i]
      if (ch == 'a' || ch == 'e' || ch == 'i'
         || ch == 'o' || ch == 'u') {
         ++vowelsCount
      } else if (ch in 'a'..'z') {
         ++consonantsCount
      }
   }
   println("The vowel count is: $vowelsCount")
   println("The consonants count is: $consonantsCount")
}

Output

The statement is defined as: Hello, my name is Charlie
The vowel count is: 8
The consonants count is: 12

Example 2

In this example, we will to count the Number of Vowels and Consonants in a Sentence −

fun main() {
   var myInput = "Hello, my name is Charlie"
   println("The statement is defined as: $myInput ")
   count(myInput)
}
fun count(input: String) {
   var myInput = input
   var vowelsCount = 0
   var consonantsCount = 0
   
   myInput = myInput.toLowerCase()
   for (i in 0..myInput.length - 1) {
      val ch = myInput[i]
      if (ch == 'a' || ch == 'e' || ch == 'i'
      || ch == 'o' || ch == 'u') {
         ++vowelsCount
      } else if (ch in 'a'..'z') {
         ++consonantsCount
      }
   }
   
   println("The vowel count is: $vowelsCount")
   println("The consonants count is: $consonantsCount")
}

Output

The statement is defined as: Hello, my name is Charlie
The vowel count is: 8
The consonants count is: 12