A simple math calculator program that I wrote in Java programming language.
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Program Listing
Math_Calculator.java
import java.util.*;
public class Math_Calculator {
public static void main(String[] args){
Scanner Input = new Scanner(System.in);
System.out.println("Enter Number");
System.out.println("1 - Addition");
System.out.println("2 - Subtraction");
System.out.println("3 - Division");
System.out.println("4 - Multiplication");
int choice = Input.nextInt();
if(choice==1){
System.out.println("Enter first number");
double num1 = Input.nextDouble();
System.out.println("Enter Second number");
double num2 = Input.nextDouble();
double sum = num1+num2;
System.out.println("sum= " + sum);
}
else if(choice==2){
System.out.println("Enter first number");
double num1 = Input.nextDouble();
System.out.println("Enter Second number");
double num2 = Input.nextDouble();
double difference = num1-num2;
System.out.println("difference= " + difference);
}
else if(choice==3){
System.out.println("Enter first number");
double num1 = Input.nextDouble();
System.out.println("Enter Second number");
double num2 = Input.nextDouble();
double qoutient = num1/num2;
System.out.println("qoutient= " + qoutient);
}
else if(choice==4){
System.out.println("Enter first number");
double num1 = Input.nextDouble();
System.out.println("Enter Second number");
double num2 = Input.nextDouble();
double product = num1*num2;
System.out.println("product= " + product);
}
else{
System.out.println("invalid");
}
}
}
