IsSet

<evalcmd> IsSet && bool && True if all specified variables exist. && name && var && Name of variable to test for. && [name...] && var && Additional variable names... </evalcmd>

Returns True if all specified variables exist (within the context of this evaluation). Returns False if any do not exist.

//Example://

if (IsSet("j")) { ... } // does a variable called "j" exist?
if (IsSet("name", "ext")) { ... } // do variables called "name" and "ext" both exist?

See also: val