# exchange() function

The exchange() function replaces the character specified as a
 hexadecimal string in *str.exp1* with the character specified as a hexadecimal
 string in *str.exp2*.

## Syntax

```
 exchange(var, str.exp1, str.exp2)
```

## Parameter(s)

| var | Specifies the variable in which the specified string will be searched and replaced. |
| --- | --- |
| str.exp1 | Specifies the character in hexadecimal string format to be replaced with the corresponding replacement character in hexadecimal string format from str.exp2. |
| str.exp2 | Specifies the character in hexadecimal string format to replace the character specified in hexadecimal string format in str.exp1. |

## Description

This function works like the convert() function, except that the second two
 arguments are specified as hexadecimal strings and only a single character can be exchanged.

## Example(s)

**Example 1**

In this example, the result is `bbc`:

```

 crt exchange("abc",dtx(seq("a")),dtx(seq("b")))
```

 **Example 2**

```

 * exchange commas to attribute marks
 var = "a,b,c"
 str.exp1 = "2c"
 str.exp2 = "fe"
 result = exchange( var, str.exp1, str.exp2 )
 crt "var = " : var
 crt "result = " : result
```

## See also

- [convert() function](https://d3codex.com/pickbasic-flashbasic/convert-function/)

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Source: https://d3codex.com/pickbasic-flashbasic/exchange-function/ - part of the D3Codex reference.