DEFBYTE, DEFDBL, DEFDWORD, DEFINT, DEFLNG, DEFSHORT, DEFSNG, DEFSTR, DEFWORD are declaration statement that names one or more variables and allocates storage space for them.

Syntax: DEFINT variable[(subscripts)] [, ...]
DEFSTR A, B, C="Hello", D, E
DEFINT I=99, J(100,10), K

You cannot specify a range of variables, for example: DEFINT A-Z works fine under QBasic, but not Rapid-Q. You can initialize each variable as demonstrated above. DEF... statements are equivalent to calling DIM, but can save you a lot of typing. To initialize an array, wrap the values around curly braces {...}. For Example,
DEFINT A(1 TO 10) = {1,2,3,4,5,6,7,8,9,10}
Initializes elements 1 through 10 with the values 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10 respectively.