# Basic syntax

## Function
 This page introduces the most basic writing rules of BT code. BT adopts an intuitive syntax similar to JS, while retaining the language mechanism of "expressions have return values".

## Statement
 usually writes one statement per line, and can also be separated by semicolons.

```bt
name = 'BT'
age = 1; println age
```

## Code block
 Curly braces `{}` wrap multi-line statements. The value of the code block is determined by the last statement.

```bt
value = if true {
    a = 1
    a + 1
}
```

## Literal
```bt
1
1.5
'text'
"text"
true
false
null
empty
[1, 2, 3]
{name: 'BT'}
```

## Chained call
 Objects, arrays, strings, HTTP clients and other capabilities support chained calls.

```bt
text = ' bt '.trim().to_uppercase()
```