---
title: "Blocks and Scopes"
description: "Dino uses braces { and } as block delimiters. A block in Dino defines a new scope where symbols reside. The top scope (anything not within {}) is called the global scope. Symbol redefinition is consi…"
url: "https://support.wheelhousemfg.com/article/9nob6zuk98-blocks-and-scopes"
category: "Dino Script® Language Reference"
updated_at: "2020-01-29T01:26:05Z"
---

# Blocks and Scopes

Dino uses braces **{** and **}** as *block delimiters*. A block in Dino defines a new *scope* where symbols reside. The top scope (anything not within {}) is called the *global scope*. *Symbol redefinition* is considered an error in Dino syntax. A symbol from an *enclosing* (parent) scope will be visible in a *child* scope, however the reverse is not true.

```
var x = 0; // this is in the global scope

{
    var y = 0; // this is in a child scope
    x += 10; // setting x from the global scope
}

var z = 0;
if true {
    var z = 0; // error, symbol redefinition of z
}

{
    var a = 0;
}
{
    var a = 1; // ok, we are in different scope
}

{
    var b = 0;
}
b = 10; // error, unknown symbol b
```