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+---
+title: not
+tags: math,logic,beginner
+---
+
+Returns the logical inverse of the given value.
+
+Use the logical not (`!`) operator to return the inverse of the given value.
+
+```js
+const not = a => !a;
+```
+
+```js
+not(true); // false
+not(false); // true
+```