Unlock the Power of Truncation in JavaScript
When working with numbers in JavaScript, precision is key. That’s where the Math.trunc() method comes in – a powerful tool that helps you shorten numbers to their integer portion.
The Syntax Behind Truncation
The Math.trunc() method is a static method, which means you access it using the class name Math. Its syntax is straightforward: Math.trunc(number), where number is the value you want to truncate.
Understanding the Parameters
The Math.trunc() method takes a single parameter: number. This can be any numeric value, including positive and negative numbers, as well as numeric strings.
What to Expect from Truncation
So, what does Math.trunc() return? The answer is simple: it returns the integer part of a number, or NaN (Not a Number) if the argument is non-numeric.
Real-World Examples
Let’s see Math.trunc() in action:
- For the negative number
-50.45627,Math.trunc()returns-50. - For the positive number
18.645,Math.trunc()returns18.
Notice that Math.trunc() doesn’t round off numbers – it simply removes the digits after the decimal point and returns the integer portion.
Working with Numeric Strings
But what if you have a numeric string? No problem! Math.trunc() can handle that too. For example, Math.trunc("15.645") converts the string to a number and truncates it, returning 15.
What Happens with Non-Numeric Arguments?
If you try to use Math.trunc() with a non-numeric argument, like a string “Luke”, you’ll get NaN as output. This is because Math.trunc() can only work with numeric values.
By mastering the Math.trunc() method, you’ll be able to tackle complex number-related tasks with ease. So, go ahead and start truncating!