JavaScript: Check whether a given integer is within 20 of 100 or 400

JavaScript Basic: Exercise-19 with Solution

Write a JavaScript program to check whether a given integer is within 20 of 100 or 400.

This JavaScript program checks whether a given integer is within 20 units of either 100 or 400. It utilizes conditional statements and the absolute value function to calculate the difference between the given integer and 100 or 400, determining if the difference is less than or equal to 20, returning true if either condition is met and false otherwise.

Sample Solution:

JavaScript Code:

// Define a function named testhundred that takes a parameter x
function testhundred(x) {
  // Return true if the absolute difference between 100 and x is less than or equal to 20,
  // or the absolute difference between 400 and x is less than or equal to 20; otherwise, return false
  return ((Math.abs(100 - x) <= 20) || (Math.abs(400 - x) <= 20));
}

// Log the result of calling the testhundred function with the argument 10 to the console
console.log(testhundred(10));

// Log the result of calling the testhundred function with the argument 90 to the console
console.log(testhundred(90));

// Log the result of calling the testhundred function with the argument 99 to the console
console.log(testhundred(99));

// Log the result of calling the testhundred function with the argument 199 to the console
console.log(testhundred(199));

// Log the result of calling the testhundred function with the argument 200 to the console
console.log(testhundred(200));

Output:

false
true
true
false
false

Live Demo:

See the Pen JavaScript: Number in a range- basic-ex-19 by w3resource (@w3resource) on CodePen.

Flowchart:

ES6 Version:

 // Using ES6 arrow function syntax to define the testhundred function
const testhundred = (x) => ((Math.abs(100 - x) <= 20) || (Math.abs(400 - x) <= 20));

// Log the result of calling the testhundred function with the argument 10 to the console
console.log(testhundred(10));

// Log the result of calling the testhundred function with the argument 90 to the console
console.log(testhundred(90));

// Log the result of calling the testhundred function with the argument 99 to the console
console.log(testhundred(99));

// Log the result of calling the testhundred function with the argument 199 to the console
console.log(testhundred(199));

// Log the result of calling the testhundred function with the argument 200 to the console
console.log(testhundred(200));

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