Created Simple Calculator in Java (#81)

Java/Simple Calculator/Calculator.java

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+
+
+import java.util.*;
+
+class Calculator{
+
+    public static void main(String args[]){
+        Scanner sc = new Scanner(System.in);
+
+        System.out.println("Simple calculator.");
+        System.out.println("\t 1. Press 1 for Addition.");
+        System.out.println("\t 2. Press 2 for Subtraction.");
+        System.out.println("\t 3. Press 3 for Multiplication.");
+        System.out.println("\t 4. Press 4 for Division."); 
+        System.out.println("\t 5. Press 5 for Remainder."); 
+        System.out.println("Enter your choice: ");
+        int choice = sc.nextInt();
+
+        int a=0,b=0,r=0;
+        if(choice <6 && choice >0){
+        System.out.println("Enter 1st no. A:");
+        a=sc.nextInt();
+        System.out.println("Enter 2nd no. B:");
+        b=sc.nextInt();
+        }
+
+            if(choice==1) //For Addition
+             {
+              r=a+b;
+              System.out.println("Addition Result : "+r);
+             }
+             else if(choice==2) //For Subtraction
+             {
+              r=a-b;
+              System.out.println("Subtraction Result : "+r);
+             }
+             else if(choice==3) // For Multiplication
+             {
+              r=a*b;
+              System.out.println("Multiplication Result : "+r);
+             }
+             else if(choice==4) // For Division
+             {
+              if(b==0){
+
+              if(a==0){
+
+              System.out.println("invalid");
+
+             }
+             else{
+
+              System.out.println("infinite");
+             }
+             }
+             else 
+             {
+              r=a/b;
+              System.out.println("Division Result : "+r);
+             }
+             }
+             else if(choice==5) // For Rmainder
+             {
+              if(b==0){
+
+              if(a==0){
+
+              System.out.println("invalid");
+
+             }
+             else{
+
+              System.out.println("infinite");
+             }
+             }
+             else 
+             {
+              r=a%b;
+              System.out.println("Remainder: "+r);
+             }
+
+             }
+             else{
+              System.out.println("invalid choice");
+             } 
+    }
+
+}