Kotlin Class: MathConstants object for Mathematical constants

Last update on February 05 2025 05:41:27 (UTC/GMT +8 hours)

Write a Kotlin program that creates an object declaration 'MathConstants' that provides constants for mathematical calculations such as PI and E.

Pre-Knowledge (Before You Start!)

Before attempting this exercise, you should be familiar with the following concepts:

• Object Declarations: In Kotlin, an object declaration creates a singleton, meaning only one instance of the object exists.
• Constants in Kotlin: Using val to define immutable values.
• Accessing Object Properties: Accessing properties of an object using objectName.propertyName.
• Printing Values: Using println() to output values to the console.

Hints (Try Before Looking at the Solution!)

Try to solve the problem using these hints:

• Hint 1: Declare an object named MathConstants instead of a class.
• Hint 2: Inside the object, define two constants, PI and E, using val.
• Hint 3: In the main() function, access the constants using MathConstants.PI and MathConstants.E.
• Hint 4: Print the values of PI and E using println().

Sample Solution:

Kotlin Code:

object MathConstants {
    val PI = 3.14159
    val E = 2.71828
}

fun main() {
    println("Value of PI: ${MathConstants.PI}")
    println("Value of E: ${MathConstants.E}")
}

Sample Output:

Value of PI: 3.14159
Value of E: 2.71828

Explanation:

In the above exercise -

• First we define an object declaration "MathConstants" which serves as a singleton object. Inside the MathConstants object, we define two properties PI and E to hold mathematical constants.
• In the "main()" function, we access PI and E values using the MathConstants object and print them.

Kotlin Editor:

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