Qore identifiers must start with an alphabetic character, and then may contain any number of alphabetic, numeric, or "_" characters. There is no length limit on Qore identifiers.

All Qore identifiers are case-sensitive, therefore the identifier hello_there is not the same as Hello_There or HELLO_THERE.

The following are examples of valid Qore identifiers:

Examples of Valid Qore Identifiers

Identifier	Description
`i`	Simple one-character identifier
`foo21`	Identifier with number
`this_is_a_long_identifier`	Long identifier with underline characters
`Total_318`	Identifier with underline and number
`AVeryBigNumber`	Mixed case identifier name
`CAPS`	Identifier in all capital letters

The following are invalid identifiers:

Examples of Invalid Qore Identifiers

Identifier	Description
`1a`	Does not start with an alphabetic character
`this-and-that`	Contains "-" characters
`Start#10`	Contains "#" character