The phrase "string of symbols" is correct and usable in written English.
It can be used to refer to a sequence of characters or symbols, often in contexts related to programming, mathematics, or linguistics.
Example: "In programming, a string of symbols can represent data or instructions that the computer interprets."
Alternatives: "sequence of characters" or "series of symbols".
The person in the room, using the manual, acts as a kind of computer program, transforming one string of symbols introduced as "input" into another string of symbols issued as "output".
This converts it into an obscure string of symbols, or a "hash", that offers no clue as to the original input.
Ciphers, as in the case of codes, also replace a piece of information (an element of the plaintext that may consist of a letter, word, or string of symbols) with another object.
The whole process is then described in a string of symbols that, to the newcomer, can look less like a reconstruction of an ordinary day's work in an 18th-century print shop than like instructions for building a small nuclear reactor.
It should be noted that the rules, though designed to ensure unambiguous sense for the wffs of PC under the intended interpretation, are themselves stated without any reference to interpretation and in such a way that there is an effective procedure for determining, again without any reference to interpretation, whether any arbitrary string of symbols is a wff or not.
NEARLY half a century ago, Frank Drake, a young radio astronomer with extraterrestrials on his mind, stepped up to a blackboard in Green Bank, W.Va., and scribbled a string of symbols intended to bring some clarity to the question of just how alone humanity is in the cosmos.
Programming bored him: more strings of symbols that seemed unnecessarily obfuscatory.
Arithmetic coding encodes strings of symbols as ranges of real numbers and achieves more nearly optimal codes.
Those strings of symbols seem to have been in widespread use 30,000 years ago, as modern humans spread through Europe, having finally seen off the Neanderthals.
These computational methods entailed the creation of increasingly sophisticated techniques for the comparison of strings of symbols that benefited from the formal study of algorithms and the study of dynamic programming in particular.
You're dealing with strings of symbols.
