Number.prototype.toPrecision() vs Number.prototype.toString()
Number.prototype.toPrecision() and Number.prototype.toString() are both JavaScript Number APIs, and choosing between them is a common point of confusion. This page compares their syntax, parameters, return values, and typical use cases so you can pick the right one. Number.prototype.toPrecision(): Returns a string with specified precision. Its syntax is num.toPrecision(precision). Number.prototype.toString(): Returns a string in the specified radix (base). Its syntax is num.toString(radix). Example of Number.prototype.toPrecision(): (1.234).toPrecision(2) // "1.2". Example of Number.prototype.toString(): (255).toString(16) // "ff". Read the full references for Number.prototype.toPrecision() and Number.prototype.toString() to see edge cases, time complexity, browser support, and the mistakes developers most often make with each. Other Number APIs worth comparing: Number.prototype.toFixed(), Number.prototype.toExponential(), Number.isNaN(), Number.isFinite(), Number.isInteger(), Number.isSafeInteger(). Both belong to the Number category in the JS Reference documentation, which covers 18 entries in total. Try both in the JavaScript playground to see the behavioral difference live.