Kotlin Program to Convert Octal Number to Decimal and vice-versa

Example 1: Program to Convert Decimal to Octal

 fun main(args: Array<String>) { val decimal = 78 val octal = convertDecimalToOctal(decimal) println("$decimal in decimal = $octal in octal") } fun convertDecimalToOctal(decimal: Int): Int { var decimal = decimal var octalNumber = 0 var i = 1 while (decimal != 0) { octalNumber += decimal % 8 * i decimal /= 8 i *= 10 } return octalNumber }

When you run the program, the output will be:

 78 in decimal = 116 in octal

This conversion takes place as:

 8 | 78 8 | 9 -- 6 8 | 1 -- 1 8 | 0 -- 1 (116) 

Example 2: Program to Convert Octal to Decimal

 fun main(args: Array<String>) { val octal = 116 val decimal = convertOctalToDecimal(octal) println("$octal in octal = $decimal in decimal") } fun convertOctalToDecimal(octal: Int): Int { var octal = octal var decimalNumber = 0 var i = 0 while (octal != 0) { decimalNumber += (octal % 10 * Math.pow(8.0, i.toDouble())).toInt() ++i octal /= 10 } return decimalNumber }

When you run the program, the output will be:

 116 in octal = 78 in decimal

This conversion takes place as:

 1 * 82 + 1 * 81 + 6 * 80 = 78

Here's the equivalent Java code: Java program to convert octal to decimal and vice-versa