A basic arithmetic calculator program in java.

CalculatorProgram.java

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+import java.util.Scanner;
+public class CalculatorProgram {
+
+	public static void main(String[] args) {
+       Scanner sc = new Scanner(System.in);
+       //Take input from from user till user press x or X
+       int ans = 0;
+       while(true) {
+    	   System.out.println("Enter the operator:  ");
+       char op = sc.next().trim().charAt(0);
+       if(op == '+' || op == '-' || op == '*' || op == '/' || op == '%') {
+    	   //input two numbers
+    	   System.out.print("Input first num: ");
+    	   int num1 = sc.nextInt();
+    			   System.out.println("input 2nd num: ");
+    	   int num2 = sc.nextInt();
+
+    	   if(op == '+') {
+    		   ans = num1 + num2;
+    	   }
+    	   if(op == '-') {
+    		   ans = num1 - num2;
+    	   }
+    	   if(op == '*') {
+    		   ans = num1 * num2;
+    	   }
+    	   if(op == '/') {
+    		   if(num2 != 0) {
+    		   ans = num1 / num2;
+    		   }
+    	   }
+    	   if(op == '%') {
+    		   ans = num1 % num2;
+    	   }
+    	   else if(op == 'x' || op == 'X') {
+    		   break;
+    	   }else {
+    		   System.out.println("Invalid operation");
+    	   }
+    	   System.out.println(ans);
+       }
+       }
+
+	}
+}