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3.4.20 ‘found-for?’ - is current index in list?

Usage: (found-for? [ for_var ])
Returns SCM_BOOL_T if the currently indexed value is present, otherwise SCM_BOOL_F. Outside of any FOR loop, it returns SCM_UNDEFINED. See section FOR - Emit a template block multiple times.

Arguments:
for_var - Optional - which for loop


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