Yorick
1.3.4: The info function
If you want to know the data type and dimensions of a variable, use the info function. Unlike help, which is intended to tell you what a thing means, info simply tells what a thing is.
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> info, theta array(double,200) > info, E array(double)
Here, double means ``double precision floating point number'', which is the default data type for any real number. The default integer data type is called long. (Both these names come from the C language, which gives them a precise meaning.)
Notice that the scalar value E is, somewhat confusingly, called an ``array''. In fact, a scalar is a special case of an array with zero dimensions. The info function is designed to print a Yorick expression which will create a variable of the same data type and shape as its argument. Thus, array(double,200) in an expression would evaluate to an array of 200 real numbers, while array(double) is a real scalar (the values are always zero).
Using info on a non-numeric quantity (a file object, a function, etc.) results in the same output as the print function. If an array of numbers might be large, try info before print.
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