JavaScript - Check two integers have opposite signs or not

JavaScript Bit Manipulation: Exercise-1 with Solution

Opposite Signs

Write a JavaScript program to check if two given integers have opposite signs.

Test Data:
(100, -100) -> "Signs are opposite"
(100, 100) -> "Signs are not opposite"
(‘100, 100) -> "Parameters value must be number!"

Sample Solution:

JavaScript Code:

// Define a function to check if the signs of two numbers are opposite
const opposite_Signs = (x, y) => {
        // Check if the parameters are numbers
        if ((typeof x!= "number") || (typeof y!= "number"))
        {
          return 'Parameters value must be number!' // Return an error message if parameters are not numbers
        }  
         // Check if the signs of the two numbers are opposite
         if ((x ^ y) < 0)
           return true; // Return true if signs are opposite
         else
           return false; // Return false if signs are not opposite
         }
x = 100 // Assign a value to variable x
y = -100 // Assign a value to variable y
result = opposite_Signs(x, y) // Call the function to check if signs are opposite
  if (result === true) 
      console.log("Signs are opposite"); // Print a message if signs are opposite
  else if (result === false) 
      console.log("Signs are not opposite"); // Print a message if signs are not opposite
  else console.log(result); // Print the result if it's neither true nor false  
x = 100 // Assign a value to variable x
y = 100 // Assign a value to variable y
result = opposite_Signs(x, y) // Call the function to check if signs are opposite

  if (result === true) 
      console.log("Signs are opposite"); // Print a message if signs are opposite
  else if (result === false) 
      console.log("Signs are not opposite"); // Print a message if signs are not opposite
  else console.log(result); // Print the result if it's neither true nor false  
x = '100' // Assign a value to variable x
y = 100 // Assign a value to variable y
result = opposite_Signs(x, y) // Call the function to check if signs are opposite
  if (result === true) 
      console.log("Signs are opposite"); // Print a message if signs are opposite
  else if (result === false) 
      console.log("Signs are not opposite"); // Print a message if signs are not opposite
  else console.log(result); // Print the result if it's neither true nor false

Output:

Signs are opposite
Signs are not opposite
Parameters value must be number!

Flowchart:

Live Demo:

See the Pen javascript-date-exercise-54 by w3resource (@w3resource) on CodePen.

* To run the code mouse over on Result panel and click on 'RERUN' button.*

For more Practice: Solve these Related Problems:

• Write a JavaScript function that checks if two numbers have opposite signs by testing if their product is negative.
• Write a JavaScript function that uses bitwise XOR to determine if two integers have opposite signs.
• Write a JavaScript function that validates inputs and returns an error if either parameter is not a number.
• Write a JavaScript function that uses a conditional operator to return "Signs are opposite" or "Signs are not opposite" based on the input values.

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