Variables in Lua

• You must not declare variables, they are created when needed.
• The type of a variable is not fix, it is defeined by the actual value.
• Variables are global, if they are not declared local.
• Values can be thefollowing types:
  • Nil
  • Numbers
  • Literals (Characters, Words...)
  • Boolean (true/false)
  • Table
  • Functionen (Special case of a block)

Test-Programm variable_1.lua

print( var )
var = "Hello World"
print( var )

The Result:

nil
Hello World

• Undefined variables are nil
• Assignment is done with =

Test-Programm variable_2.lua

print( var1, var2 )
var1, var2 = 1, 4
print( var1, var2 )

The Result:

nil	nil
1	4

• Multiple assignment is possible