How to convert a number to its scientific notation representation in Kotlin

How to convert a number to its scientific notation representation in Kotlin.

Here's a step-by-step tutorial on how to convert a number to its scientific notation representation in Kotlin:

Step 1: Start by defining the number you want to convert. Let's say we have a number called num:

val num = 123456789.0

Step 2: Determine the power of 10 that represents the magnitude of the number. This can be calculated using the logarithm base 10 function log10():

val magnitude = kotlin.math.log10(num)

Step 3: Determine the exponent value by rounding the magnitude to the nearest integer. This can be done using the roundToInt() function:

val exponent = magnitude.roundToInt()

Step 4: Calculate the significand (the number part without the exponent) by dividing the original number by 10 raised to the power of the exponent. This can be done using the pow() function from the kotlin.math package:

val significand = num / 10.0.pow(exponent)

Step 5: Finally, format the scientific notation representation by combining the significand, the letter 'E', and the exponent value. You can use string interpolation to achieve this:

val scientificNotation = "$significand E $exponent"

And that's it! You have successfully converted a number to its scientific notation representation in Kotlin.

Here's the complete code example:

import kotlin.math.pow
import kotlin.math.roundToInt
import kotlin.math.log10

fun main() {
    val num = 123456789.0
    val magnitude = log10(num)
    val exponent = magnitude.roundToInt()
    val significand = num / 10.0.pow(exponent)
    val scientificNotation = "$significand E $exponent"
    println(scientificNotation)
}

Output:

1.23456789 E 8

You can try this code with different numbers and observe the output to verify the correctness of the conversion.

That's all for converting a number to its scientific notation representation in Kotlin. Hope you find this tutorial helpful!