/> /> /> /> /> JavaScript Number.prototype.toFixed() — Method

Number.prototype.toFixed()

Number.prototype.toFixed() is a JavaScript method in the Number category. Formats a number using fixed-point notation. The syntax is num.toFixed(digits). It returns A string representing the number. A typical example: (1.234).toFixed(2) // "1.23". Another practical use — Format currency: const amount = 123.456 console.log(' + amount.toFixed(2)) // '$123.46' The TypeScript signature is (fractionDigits?: number): string. Common pitfall — Returns a string, not a number. toFixed() returns a string. To use the result in calculations, convert with Number() or parseFloat(). A close sibling is Number.prototype.toExponential(), which returns a string in exponential notation. A close sibling is Number.prototype.toPrecision(), which returns a string with specified precision. A close sibling is Number.prototype.toString(), which returns a string in the specified radix (base). A close sibling is Number.isNaN(), which determines whether a value is NaN. More about this category: Number methods for numeric operations — toFixed, parseInt, isNaN, and more. Related Number methods: Number.prototype.toExponential(), Number.prototype.toPrecision(), Number.prototype.toString(), Number.isNaN(), Number.isFinite(), Number.isInteger(), Number.isSafeInteger(), Number.parseFloat().