chickadee » posix-utils » environment-variable-bound?

environment-variable-bound? VARNAMprocedure

Does the environment variable VARNAM exist with a non-null value?

VARNAM is a string.

FOO=1 BAR= csi -R posix-utils
#;1> (environment-variable-bound? "FOO") 
#t
#;2> (environment-variable-bound? "BAR")
#f