The big and Small of JavaScript numbers (2017)

JavaScript numbers are represented as double-precision floating-point values, which can lead to both accurate and inaccurate representations of whole numbers and floating-point values. Notably, JavaScript does not experience overflow; instead, numbers become positive or negative infinity. Division by zero results in infinity rather than an exception, and nonsensical calculations yield "not a number." The article discusses various coding patterns that can enhance the reliability of JavaScript code. For instance, safe division can be achieved by adding a small constant (EPSILON) to the divisor to avoid division by zero errors. Clamping values within specified bounds can be done using the Math.min and Math.max functions, reducing the need for conditional statements. The author also highlights the utility of using Infinity as a default value in functions to ensure that operations remain valid regardless of input. Other mathematical functions, such as Math.sign, can help determine the direction of changes in values. The article emphasizes the importance of avoiding complex conditional logic in favor of simpler, more reliable mathematical expressions to prevent bugs and maintain code clarity.

- JavaScript numbers are double-precision floating-point values, leading to unique behaviors like infinity and "not a number."

- Safe division can be implemented by adding a small constant to the divisor to prevent division by zero.

- Clamping values can simplify code and reduce conditional statements using Math.min and Math.max.

- Infinity can be used as a default value in functions to ensure valid operations.

- Simplifying logic with mathematical functions can help prevent bugs and improve code clarity.