Read the value at the top of the stack. Used in if statement conditionals.
When writing an
if statement, you may want to use a value from a previous computation.
To do so, you need to use
Read to retrieve the last computed value before an if statement was evaluated.
The following example loads an image, reads the text in the image, and shows the image if it contains "tea".
Load["./photo.jpg"] GetText If[Read == "tea"] Show