Kotlin Program: Fibonacci series up to a given number

Kotlin Control Flow: Exercise-6 with Solution

Write a Kotlin program to print the Fibonacci series up to a given number.

Sample Solution:

Kotlin Code:

 fun main() {
    val n = 30  

    println("Fibonacci series up to $n:")
    printFibonacciSeries(n)
}

fun printFibonacciSeries(n: Int) {
    var num1 = 0
    var num2 = 1

    print("$num1, $num2")
     
    while (num2 <= n) {   
        val nextNum = num1 + num2
        if (nextNum<=n)
        {
        print(", $nextNum")
        }
        num1 = num2
        num2 = nextNum
    }
}

Sample Output:

Fibonacci series up to 30:
0, 1, 1, 2, 3, 5, 8, 13, 21 

Explanation:

In the above exercise,

• The "n" variable is declared and assigned a specific value, in this case, 20.
• The printFibonacciSeries() function takes "n" as an argument and prints the Fibonacci series up to "n".
• Inside the printFibonacciSeries() function, we initialize two variables num1 and num2 with the first two numbers of the Fibonacci series (0 and 1).
• We print the initial numbers 0 and 1 using the print() function.
• Using a while loop, we generate the next numbers in the series by adding num1 and num2 and store it in nextNum.
• We print nextNum using print().
• We update num1 with the value of num2 and num2 with the value of nextNum to generate the next numbers in the series.
• The loop continues until num2 exceeds "n".

Kotlin Editor:

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