Question

which symbol used to represent
the null / empty
Charactor 2​

Answer 1

The null sign U+2205 ∅ EMPTY SET denotes the empty set in mathematics. The same letter in linguistics represents zero, the lack of an element.

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Answer 2

$\huge \mathcal \color{darkblue} \boxed{\underline{AnsWer :}}$

\0 is used in c language.

The null sign U+2205 , ∅ EMPTY SET denotes the empty set in mathematics.