Terms
Built-in Command A command whose code is part of the shell as opposed to a utility that exists in a separate disk file and which must be read into memory before it is executed.
Modulus See remainder.
no-op A command that does nothing and thus can be used as a dummy command or placeholder where syntax requires a command.
Remainder The remainder of a division operation, which is the amount that is left over when the amounts are not evenly divisible.
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