REBOL 3 Docs Guide Concepts Functions Datatypes Errors
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REBOL 3 Functions: image?

image?  value

Returns TRUE if it is this type.


value [any-type!]

See also:



Returns true if the value is an image! datatype.

This function is often used after the load function to verify that the data is in fact an image. For example:

img: load %test-image.png
if not image? img [alert "Not an image file!"]

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