Day 2: Operators: Arithmetic, Assignment, Comparison, Logical

 Type of Operators

• Arithmetic Operator
• Assignment Operator
• Comparison Operator

String Operator

Logical Operator

Bitwise Operator

Ternary Operator

Type Operator

->

1) Arithmetic Operator

 

+) Plus

-) Minus

*)Multiply

/) Division (Top of Result)

%) Reminder(Bottom of Result) 

**) Exponential (ex. 5**2 = 5*5 = 25)

++) Increment

--) Decrement

2) Assignment Operator

=

+=

-=

*=

/=

**=

Shift Assignment Operator

>>=

<<=

>>>=

Bitwise Assignment Operator

&=

^=

|=

Logical Assignment Operator

&&=

||=

??=

const readline = require("readline").createInterface({

  input: process.stdin,

  output: process.stdout,

});

readline.question("Enter first number: ", (num1) => {

  readline.question("Enter second number: ", (num2) => {

    readline.question("Enter operator (+, -, *, /): ", (operator) => {

      const a = parseFloat(num1);

      const b = parseFloat(num2);

      let result;

      if (isNaN(a) || isNaN(b)) {

        console.log("Error: Invalid number.");

      } else {

        if (operator === "+") {

          result = a + b;

        } else if (operator === "-") {

          result = a - b;

        } else if (operator === "*") {

          result = a * b;

        } else if (operator === "/") {

          result = b !== 0 ? a / b : "Error: Division by zero.";

        } else {

          result = "Error: Invalid operator.";

        }

        console.log("Result: " + result);

      }

      readline.close();

    });

  });

});