Day 1 practice questions.{Methods(static method) Questions With Solutions}

Question 1 : Write a Java method to find the smallest number among three numbers.

import java.util.Scanner;

public class Practice_Day_1 {

    static float smallestNumber(float a , float b , float c){

        float d;

        if (a<b || a<c) {

            d = a;

        }

        else if (b<a || b<c) {

           d = b;

        }

        else{

            d = c;

        }

        return d;

    }

    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);

        System.out.println("Enter the first number");

        float firstNumber = sc.nextFloat();

        System.out.println("Enter the second number");

        float secondNumber = sc.nextFloat();

        System.out.println("Enter the third number");

        float thirdNumber = sc.nextFloat();

        float smallNumber = smallestNumber(firstNumber , secondNumber , thirdNumber);

        System.out.println(smallNumber);

    }

}

Output:

Enter the first number 25 Enter the second number 37 Enter the third number 29 25.0

Question 2 : Write a Java method to compute the average of three numbers.

import java.util.Scanner;

public class Practice_Day_1 {

    static float average(float a , float b , float c){

        float d = (a + b + c) / 3;

        return d;

    }

    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);

        System.out.println("Enter the first number");

        float firstNumber = sc.nextFloat();

        System.out.println("Enter the second number");

        float secondNumber = sc.nextFloat();

        System.out.println("Enter the third number");

        float thirdNumber = sc.nextFloat();

        float avg = average(firstNumber , secondNumber , thirdNumber);

        System.out.println(avg);

    }

}

Output:

Enter the first number 25 Enter the second number 45 Enter the third number 65 45.0

Question 3 : Write a Java method to display the middle character of a string. 

Note: a) If the length of the string is odd there will be two middle characters.
b) If the length of the string is even there will be one middle character.

import java.util.Scanner;

public class Practice_Day_1 {

   static void middleCharacter(String a){

        int position;

        int length;

        int b = a.length();

        if (b % 2 == 0) {

            position = b / 2 - 1;

            length = 2;

            System.out.println(a.substring(position , position + length));

        }

        else{

            position = b / 2;

            length = 1;

            System.out.println(a.substring(position , position + length));

        }

    }

    public static void main(String[] args) {

            Scanner sc = new Scanner(System.in);

            System.out.print("Enter a String : ");

            String a = sc.nextLine();

            middleCharacter(a);

    }

}

Output 1:(Odd number of characters in the string)

Enter a String : Like The Post h

Output 2:(Even number of characters in the string)

Enter a String : void oi