How Can I Distinguish Between Floating-Point and Integer Values in Programming?

Determining the Nature of Numeric Values: Floating-Point or Integer

The ability to discern whether a number is a floating-point or integer value is crucial in various programming scenarios. Here's how you can approach this problem:

Checking for Remainder

One method for distinguishing between floats and integers is by checking the remainder when the number is divided by 1. If the remainder is zero, the number is an integer; otherwise, it's a floating-point number.

function isInt(n) {
  return n % 1 === 0;
}

Additional Tests for Unknown Types

If you're dealing with an unknown type and want to handle both numbers and non-numeric values, you can employ the following function:

function isInt(n) {
  return Number(n) === n && n % 1 === 0;
}

function isFloat(n) {
  return Number(n) === n && n % 1 !== 0;
}

ECMA Script 2015 Solution

In ECMA Script 2015, a standardized solution was introduced using the Number.isInteger() method, which simplifies the process:

Number.isInteger(n);  // Returns true for integers and false for floats

These methods provide convenient ways to determine the numeric nature of values in your code, allowing for more precise operations and efficient handling of data.

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