Standard Streams

Std Model


A computer system very simply acts upon input provided by either a human, another computer or built in procedures, which it then acts upon (computes) and provides the desired result as output.



Standard Input is usually received from the keyboard


stdout / stderr

Standard Out and Standard Error are usually sent to the screen


Term Location Abbreviation Signal
Standard In Keyboard stdin 0
Standard Out Screen stdout 1
Standard Error Screen stderr 2


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