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4.3 Standard Formatted I/O

• Standard Formatted Output  ’printf
• Standard Formatted Input  ’scanf

4.3.1 stdio

(require 'stdio)

requires printf and scanf and additionally defines the symbols:

Variable: stdin

Defined to be (current-input-port).

Variable: stdout

Defined to be (current-output-port).

Variable: stderr

Defined to be (current-error-port).