Kotlin program: Convert list of strings to uppercase with lambda

Last update on December 20 2024 13:11:17 (UTC/GMT +8 hours)

Write a Kotlin program that implements a lambda expression to convert a list of strings to uppercase.

Sample Solution:

Kotlin Code:

fun main() {
    val strings = listOf("red", "green", "blue", "white", "orange", "black")

    val uppercaseList = strings.map { it.uppercase() }

    println("Uppercase List:")
    uppercaseList.forEach { println(it) }
}

Sample Output:

Uppercase List:
RED
GREEN
BLUE
WHITE
ORANGE
BLACK

Explanation:

In the above exercise -

• We have a list of strings called "strings". We use the map function on the "strings" list and provide a lambda expression { it.toUpperCase() } as the mapping operation.
• Inside the lambda expression, we call the toUpperCase function on each string (it) to convert it to uppercase.
• The "map()" function applies the lambda expression to each element of the "strings" list and returns a new list with transformed uppercase strings.
• Finally, we print the uppercase list using println and forEach to iterate over each string in the uppercase list. We print it on a separate line.

Kotlin Editor:

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