JAVA TUTORIALS FOR BEGINNER: calculator

Calculator program in java

<div style="text-align: center; padding: 5px;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgctfd8Pd3eFigCOnvjz26AX4J9jUf6tvA4dadU2-rjsI-BE4_ZLoLpyynJrXPhwru4OF4CGVXVHjN7q5NGhi2tU0fKLRkJej5opjhRQMoVUYZkW_xN-cLCWOSf1HLtDMGJtc18fv-FQL_L/"><img src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgctfd8Pd3eFigCOnvjz26AX4J9jUf6tvA4dadU2-rjsI-BE4_ZLoLpyynJrXPhwru4OF4CGVXVHjN7q5NGhi2tU0fKLRkJej5opjhRQMoVUYZkW_xN-cLCWOSf1HLtDMGJtc18fv-FQL_L/ cursor: pointer;" style="border: 1px solid; border-radius: 2px;padding: 5px; max-width: 320px " width="320px" /></a></div><div class="blogaway-section">import java.util.Scanner; 
import java.io.*; 
 public class Calculator { 
     public static void main(String[] args) { 
         int choice; 
        int x = 0; 
        int y = 0; 
        int sum; 
         
        PrintStream out; 
         
        Scanner input ; 
         Calculator calc = new Calculator(); 
         try { 
            out = new PrintStream("calclog.txt"); 
             do { 
                System.out.println("Calculator Program"); 
                System.out.println("--------------------\n"); 
                System.out.println("1. Add"); 
                System.out.println("2. Subtract"); 
                System.out.println("3. Multiply"); 
                System.out.println("4. Divide"); 
                System.out.println("5. Mod"); 
                System.out.println("6. Power"); 
                System.out.println("99. End Program\n"); 
                System.out.println("Enter Choice: "); 
                 input = new Scanner(System.in); 
                choice = input.nextInt(); 
                 while ((choice < 1 || choice > 6) && choice != 99) { 
                     System.out.println("Please enter 1, 2, 3, 4, 5, or 6: "); 
                    choice = input.nextInt(); 
                 } 
                 if (choice != 99) { 
                     System.out.println("Please enter 2 numbers only: "); 
                    x = input.nextInt(); 
                    y = input.nextInt(); 
                 } 
                 switch (choice) { 
                 
                case 1: 
                     
                    sum = calc.add(x, y); 
                    System.out.printf("The sum is %d\n\n", sum); 
                    out.println(x + "+" + y + "=" + sum); 
                     
                    break; 
                 case 2: 
                     
                    sum = calc.sub(x, y); 
                    System.out.printf("The answer is %d\n\n", sum); 
                    out.println(x + "-" + y + "=" + sum); 
                     
                    break; 
                 case 3: 
                     
                    sum = calc.multi(x, y); 
                    System.out.printf("The answer is %d\n\n", sum); 
                    out.println(x + "*" + y + "=" + sum); 
                     
                    break; 
                 case 4: 
                     
                    try { 
                         sum = calc.div(x, y); 
                        System.out.printf("The answer is %d\n\n", sum); 
                        out.println(x + "/" + y + "=" + sum); 
                     } catch (Exception e) { 
                         System.out 
                                .println("\nError: Cannot Divide by zero\n\n"); 
                     } 
                     
                    break; 
                 case 5: 
                     
                    sum = calc.mod(x, y); 
                    System.out.printf("The mod is %d\n\n", sum); 
                    out.println(x + "%" + y + "=" + sum); 
                     
                    break; 
                 case 6: 
                     
                    sum = calc.pow(x, y); 
                    System.out.printf("The answer is %d\n\n", sum); 
                    out.println(x + "^" + y + "=" + sum); 
                     
                    break; 
                } 
             } 
             while (choice != 99); 
            input.close(); 
            System.out.println("Ending program..."); 
         } 
         catch (Exception e) { 
            System.out.println("ERROR: Some error occured"); 
            e.printStackTrace(); 
        } 
     } 
     public int add(int num1, int num2) { 
         int sum; 
        sum = num1 + num2; 
         return sum; 
    } 
     public int sub(int num1, int num2) { 
         int sum; 
        sum = num1 - num2; 
         return sum; 
    } 
     public int multi(int num1, int num2) { 
         int sum; 
        sum = num1 * num2; 
         return sum; 
    } 
     public int div(int num1, int num2) { 
         int sum; 
        sum = num1 / num2; 
         return sum; 
    } 
     public int mod(int num1, int num2) { 
         int sum; 
        sum = num1 % num2; 
         return sum; 
    } 
     public int pow(int base, int exp) { 
         int sum = 1; 
         if (exp == 0) { 
            sum = 1; 
        } 
         while (exp > 0) { 
            sum = sum * base; 
            exp--; 
         } 
         return sum; 
     } 
 } 
OUTPUT 
 Calculator Program 
-------------------- 
 1. Add 
2. Subtract 
3. Multiply 
4. Divide 
5. Mod 
6. Power 
99. End Program 
 Enter Choice: 
4 
Please enter 2 numbers only: 
4 
2 
The answer is 2 
 Calculator Program 
-------------------- 
 1. Add 
2. Subtract 
3. Multiply 
4. Divide 
5. Mod 
6. Power 
99. End Program 
 Enter Choice: 
99 
Ending program...</div>

Calculator program in java

import java.util.Scanner; import java.io.*; public class Calculator { public static void main(String[] args) { int choice; ...

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Calculator program in java