Serial or parallel resistance calculation

ResistanceCalculation.java

import java.util.Scanner;

class ResistanceCalculation {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int calculationType = 1;
        System.out.println("Enter the type of calculation:");
        System.out.println("1. Serial");
        System.out.println("2. Parallel");
        calculationType = scanner.nextInt();
        System.out.println("Enter the N of resistances:");
        int n = scanner.nextInt();
        float[] resistances = new float[n];
        for (int i = 0; i < n; i++) {
            System.out.print("Data[" + (i + 1) + "]: ");
            resistances[i] = scanner.nextFloat();
        }
        if (calculationType == 1) {
            System.out.println("\nSerial calculation:");
            System.out.println(serialCalculation(resistances));
        } else {
            System.out.println("\nParallel calculation:");
            System.out.println(parallelCalculation(resistances));
        }

    }

    public static float serialCalculation(float[] data) {
        float sum = 0f;
        for (float datum : data) {
            sum += datum;
        }
        return sum;
    }

    public static float parallelCalculation(float[] data) {
        float sum = 0f;
        for (float datum : data) {
            sum += 1f / datum;
        }
        return 1f / sum;
    }
}