cfunction
src/core/io.c on line 678 , column 1
(xprinf to fmt & xs )
Like `prinf` but prints to an explicit file or value `to` . Returns
nil.
(def b @"" )
(def v ( 1000 (math/random )))
# => 487.181 your number can differ
(xprinf b "Value reached level %f" v )
# => nil
b
# => @"Value reached level 487.181188"