mql5-skills/skills/mql5/references/docs/00-basis/0004-basis-syntax-identifiers.md

Identifiers

Identifiers are used as names of variables and functions. The length of the identifier can not exceed 63 characters.

Characters allowed to be written in an identifier: figures 0-9, the Latin uppercase and lowercase letters a-z and A-Z, recognized as different characters, the underscore character (_).The first character can not be a digit.

The identifier must not coincide with reserved word.

Examples:

NAME1 namel Total_5 Paper

See also

Variables, Functions