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How to count the number of lines in a string in Kotlin

How to count the number of lines in a string in Kotlin.

Here is a step-by-step tutorial on how to count the number of lines in a string in Kotlin.

Step 1: Initialize the String​

First, you need to initialize the string for which you want to count the number of lines. You can do this by assigning the string to a variable. For example:

val myString = "This is a sample string.\nIt has multiple lines.\nCounting the number of lines is important."

In this example, myString is the variable that holds the string for which we want to count the number of lines. The string contains three lines separated by the newline character (\n).

Step 2: Split the String into Lines​

Next, you need to split the string into lines. Kotlin provides a split function that can be used to split a string based on a specified delimiter. In this case, the delimiter is the newline character (\n). You can use the split function with the split method of the string. Here's an example:

val lines = myString.split("\n")

In this example, lines is a list that contains each line of the string as an element.

Step 3: Count the Number of Lines​

Now that you have the lines split into a list, you can simply count the number of elements in the list to get the number of lines. Kotlin provides a size property that can be used to get the size of a list. Here's an example:

val lineCount = lines.size

In this example, lineCount is a variable that holds the number of lines in the string. It is assigned the value of the size property of the lines list.

Step 4: Print the Result​

Finally, you can print the number of lines to verify the result. Kotlin provides a println function that can be used to print the output to the console. Here's an example:

println("The string has $lineCount lines.")

In this example, the result is printed using string interpolation. The $lineCount expression is replaced with the value of the lineCount variable.

Complete Example​

Here is a complete example that combines all the steps mentioned above:

fun main() {
    val myString = "This is a sample string.\nIt has multiple lines.\nCounting the number of lines is important."
    val lines = myString.split("\n")
    val lineCount = lines.size
    println("The string has $lineCount lines.")
}

When you run this code, it will output:

The string has 3 lines.

That's it! You have successfully counted the number of lines in a string in Kotlin.