Z is the symbol for integer. It is the initial letter of Zahlen, the German word meaning "number"
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The set of integers is represented by Z.
The symbol for the set of integers is Z and it comes from the German word Zahlen, meaning numbers.
ℤ is the symbol for the set of all integers, that is {..., -2, -1, 0, 1, 2, ...}.
The symbol used for a negative is a minus Sign
Because Zahlen is German for "numbers."