Java Series #1: Data Type Questions

Programming Challenges

1. Add Two Integers Easy

Problem

Write a program to add two integers.

Input Format

The first line contains a single integer m.
The second line contains a single integer n.

Output Format

Print the sum of the integers m and n.

Sample Input 1

5
10

Sample Output 1

Code

import java.util.Scanner;

class AddTwoIntegers {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int m = sc.nextInt();
        int n = sc.nextInt();
        int sum = m + n;
        System.out.println(sum);
    }
}

2. Add Three Integer Numbers Easy

Problem

Write a program to add three integers.

Input Format

The first line contains a single integer m.
The second line contains a single integer n.
The third line contains a single integer p.

Output Format

Print the sum of the integers m, n, and p.

Sample Input 1

10
15
5

Sample Output 1

Code

import java.util.Scanner;

class AddThreeIntegers {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int m = sc.nextInt();
        int n = sc.nextInt();
        int p = sc.nextInt();
        int sum = m + n + p;
        System.out.println(sum);
    }
}

3. Product of Three Integer Numbers Medium

Problem

Write a program to calculate the product of three integers.

Input Format

The first line contains a single integer a.
The second line contains a single integer b.
The third line contains a single integer c.

Output Format

Print the product of the integers a, b, and c.

Constraints

−1000≤a,b,c≤1000

Sample Input 1

2
3
4

Sample Output 1

Code

import java.util.Scanner;

class ProductThreeIntegers {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        int c = sc.nextInt();
        int product = a * b * c;
        System.out.println(product);
    }
}

4. Write a Program for Sum Combinations Easy

Problem

Write a program to calculate the sum combinations of three integers.

Input Format

The first line contains a single integer a.
The second line contains a single integer b.
The third line contains a single integer c.

Output Format

Print the sums of the combinations a + b, a + c, and b + c.

Constraints

0≤a,b,c≤1000

Sample Input 1

2
3
4

Sample Output 1

5
6
7

Code

import java.util.Scanner;

class SumCombination {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        int c = sc.nextInt();
        
        System.out.println(a + b);
        System.out.println(a + c);
        System.out.println(b + c);
    }
}

5. Calculate Circle’s Circumference Medium

Problem

Write a program to calculate the circumference of a circle using the formula C = 2πr, where π ≈ 3.14159.

Input Format

The first line contains a single r (the radius of the circle).

Output Format

Print the circumference of the circle, formatted to four decimal places.

Constraints

1≤radius≤10000

Sample Input 1

Sample Output 1

31.4159

Code

import java.util.Scanner;

class CircleCircumference {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        double radius = sc.nextDouble();
        double pi = 3.14159;
        double circumference = 2 * pi * radius;
        System.out.printf("%.4f%n", circumference);
    }
}

6. Convert Dollar to Rupees Easy

Problem

Write a program to convert US dollars to Indian rupees. The conversion rate is 1 USD = 82.73 INR.

Formula

INR = USD * 82.73

Input Format

The first line contains a single floating-point number USD.

Output Format

Print the equivalent amount in Indian rupees (INR).

Constraints

0.01 ≤ USD ≤ 10000

Sample Input 1

Sample Output 1

8273.00

Code

import java.util.Scanner;

class DollarToRupees {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        double usd = sc.nextDouble();
        double inr = usd * 82.73;
        System.out.println(inr);
    }
}

7. Find the Perimeter of a Rectangle Easy

Problem

Write a program to calculate the perimeter of a rectangle using the formula.

Formula

Perimeter = 2 * (length + width)

Input Format

The first line contains a single integer length.
The second line contains a single integer width.

Output Format

Print the perimeter of the rectangle.

Constraints

1 ≤ length, width ≤ 1000

Sample Input 1

5
3

Sample Output 1

Code

import java.util.Scanner;

class RectanglePerimeter {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int length = sc.nextInt();
        int width = sc.nextInt();
        int perimeter = 2 * (length + width);
        System.out.println(perimeter);
    }
}

8. Find the Area of a Circle Easy

Problem

Write a program to calculate the area of a circle using the formula.

Formula

Area = π * radius^2, where π ≈ 3.14159

Input Format

The first line contains a single integer radius.

Output Format

Print the area of the circle.

Constraints

1 ≤ radius ≤ 10000

Sample Input 1

Sample Output 1

78.53975

Code

import java.util.Scanner;

class CircleArea {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        double radius = sc.nextDouble();
        double area = 3.14159 * radius * radius;
        System.out.println(area);
    }
}

9. Find the Total Surface Area of a Cylinder Medium

Problem

Write a program to calculate the total surface area of a cylinder.

Formula

Total Surface Area = 2πr(h + r), where π ≈ 3.14159

Input Format

The first line contains a single integer radius.
The second line contains a single integer height.

Output Format

Print the total surface area of the cylinder.

Constraints

1 ≤ radius, height ≤ 1000

Sample Input 1

5
10

Sample Output 1

471.2385

Code

import java.util.Scanner;

class CylinderSurfaceArea {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        double radius = sc.nextDouble();
        double height = sc.nextDouble();
        double surfaceArea = 2 * 3.14159 * radius * (height + radius);
        System.out.println(surfaceArea);
    }
}

10. Find the Perimeter of a Square Easy

Problem

Write a program to calculate the perimeter of a square using the formula.

Formula

Perimeter = 4 * side

Input Format

The first line contains a single integer side.

Output Format

Print the perimeter of the square.

Constraints

1 ≤ side ≤ 1000

Sample Input 1

Sample Output 1

Code

import java.util.Scanner;

class SquarePerimeter {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int side = sc.nextInt();
        int perimeter = 4 * side;
        System.out.println(perimeter);
    }
}

11. Convert Fahrenheit to Celsius Easy

Problem

Write a program to convert a temperature from Fahrenheit to Celsius.

Formula

Celsius = (Fahrenheit - 32) * 5/9

Input Format

The first line contains a single floating-point number Fahrenheit.

Output Format

Print the equivalent temperature in Celsius.

Constraints

-1000 ≤ Fahrenheit ≤ 1000

Sample Input 1

98.6

Sample Output 1

37.0

Code

import java.util.Scanner;

class FahrenheitToCelsius {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        double fahrenheit = sc.nextDouble();
        double celsius = (fahrenheit - 32) * 5 / 9;
        System.out.println(celsius);
    }
}

12. Calculate Simple Interest Medium

Problem

Write a program to calculate simple interest using the formula.

Formula

SI = (P * R * T) / 100, where:

P is the principal amount
R is the rate of interest
T is the time in years

Input Format

The first line contains a single integer P.
The second line contains a single floating-point number R.
The third line contains a single integer T.

Output Format

Print the simple interest.

Constraints

1 ≤ P, T ≤ 10000
0.01 ≤ R ≤ 20.00

Sample Input 1

1000
5.5
2

Sample Output 1

110.0

Code

import java.util.Scanner;

class SimpleInterest {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int P = sc.nextInt();
        double R = sc.nextDouble();
        int T = sc.nextInt();
        double SI = (P * R * T) / 100;
        System.out.println(SI);
    }
}