stdio
Use this file to get input from the terminal, or to display information on the user's screen. This is the file always used by print and << if it is not explicitly given a file.
i1 : << "hi" << endl hi o1 = stdio o1 : File
i2 : stdio << "hi" << endl hi o2 = stdio o2 : File
The object stdio is a file.
The source of this document is in /build/reproducible-path/macaulay2-1.25.05+ds/M2/Macaulay2/packages/Macaulay2Doc/ov_system.m2:387:0.