CDBL converts a value to the closest DOUBLE-precision value.

## Syntax

doubleValue# = CDBL(expression)

## Parameter(s)

- expression is any TYPE of literal or variable numerical value or mathematical calculation.

## Description

- Rounds to the closest DOUBLE floating decimal point value.
- Also can be used to define a value as DOUBLE-precision up to 15 decimals.

## Example(s)

Prints a double-precision version of the single-precision value stored in the variable named A.

```
A = 454.67
PRINT A; CDBL(A)
```

```
454.67 454.6700134277344
```

The last 11 numbers in the double-precision number change the value in this example, since A was previously defined to only two-decimal place accuracy.