Add toOptionalFixed

snippets/toOptionalFixed.md

@@ -0,0 +1,24 @@
+---
+title: Number to fixed-point notation without trailing zeros
+tags: math,string
+expertise: beginner
+author: chalarangelo
+firstSeen: 2022-05-10T05:00:00-04:00
+---
+
+Formats a number using fixed-point notation, if it has decimals.
+
+- Use `Number.prototype.toFixed()` to convert the number to a fixed-point notation string.
+- Use `Number.parseFloat()` to convert the fixed-point notation string to a number, removing trailing zeros.
+- Use a template literal to convert the number to a string.
+
+```js
+const toOptionalFixed = (num, digits) =>
+  `${Number.parseFloat(num.toFixed(digits))}`;
+```
+
+```js
+toOptionalFixed(1, 2); // '1'
+toOptionalFixed(1.001, 2); // '1'
+toOptionalFixed(1.500, 2); // '1.5'
+```