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snippets/javascript-expression-statement.md

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+---
+title: What is the difference between an expression and a statement in JavaScript?
+shortTitle: Expressions and statements
+type: question
+tags: [javascript,type]
+author: chalarangelo
+cover: forest-balcony
+excerpt: JavaScript distinguishes expressions and statements. Learn their differences in this short article.
+dateModified: 2021-11-07T05:00:00-04:00
+---
+
+JavaScript distinguishes expressions and statements. An **expression** is any valid unit of code that resolves to a value. A **statement** is a unit of code that performs an action. Some examples:
+
+```js
+// Statements
+let x = 0;
+function add(a, b) { return a + b; }
+if (true) { console.log('Hi'); }
+
+// Expressions
+x;          // Resolves to 0
+3 + x;      // Resolves to 3
+add(1, 2);  // Resolves to 3
+```
+
+Anywhere JavaScript expects a statement, you can also write an expression. This kind of statement is called an **expression statement**. Conversely, you cannot write a statement where JavaScript expects an expression.