Command Loop
Contrast with Fetch-Execute that retrieves instructions (highly encoded commands) from random-access memory.
Command Loop |
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| The exact number and sequence of operations desired of a program will not be known until it is run. Therefore: | |
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Read commands from a file until the file is exhausted. Look up each command in a table of legal operations. When matched, dispatch to a handler that reads additional arguments and performs the operation. |
| A variation is the read-eval-print loop in which all commands evaluate
to a result that is printed before looping to read the next command.
Contrast with Fetch-Execute that retrieves instructions (highly encoded commands) from random-access memory. |