Basics
JS Numbers
JavaScript Number Handling
JavaScript numbers include BigInt, with methods like toFixed for formatting.
Understanding JavaScript Numbers
JavaScript numbers are a fundamental part of the language, representing both integer and floating-point values. All numbers in JavaScript are stored as double-precision 64-bit binary format IEEE 754 values. This means that numbers can be positive or negative, and can include decimal points.
Let's delve into some key features and methods associated with JavaScript numbers, including BigInt and the toFixed method.
BigInt: Working with Large Integers
While typical JavaScript numbers are capable of representing values accurately up to 253 - 1, there are cases where you need to work with larger integers. This is where BigInt comes into play. BigInt allows you to represent integers with arbitrary precision.
You can create a BigInt by appending an n to the end of an integer or by using the BigInt() constructor. Note that BigInt is not interchangeable with regular numbers, so operations mixing the two types require conversion.
Formatting Numbers with toFixed()
The toFixed() method formats a number using fixed-point notation. This is especially useful when you need to control the number of decimal places of a number, such as for currency or percentage values.
The toFixed() method returns a string representation of the number with a specified number of digits after the decimal point. If the specified number of digits is greater than the number of actual decimal places, the number is padded with zeros. If it is less, the number is rounded.
Conclusion
JavaScript numbers are versatile, allowing for a wide range of operations from basic arithmetic to handling extremely large integers with BigInt. Methods like toFixed() provide additional control over how numbers are formatted for display purposes.
In the next post, we will explore Number Properties in JavaScript, which will give you a deeper understanding of how numbers behave in different scenarios.
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