QB64-website/wiki/UBOUND.md

The UBOUND function returns the largest valid index (upper bound) of an array dimension.

Syntax

result% = UBOUND(arrayName[, dimension%])

Description

• arrayName specifies the name of the array.

• dimension% specifies the dimension number, starting with 1 for the first dimension.

  • If omitted, dimension% is assumed to be 1.
  • If dimension% is less than 1 or is greater than the number of dimensions, a ERROR Codes error occurs.

• UBOUND, along with LBOUND, is used to determine the range of valid indexes of an array.

Example(s)

DIM myArray(5) AS INTEGER
DIM myOtherArray(1 to 2, 3 to 4) AS INTEGER

PRINT UBOUND(myArray)
PRINT UBOUND(myOtherArray, 2)

 5
 4

See Also

• Arrays, LBOUND
• DIM, COMMON, STATIC, SHARED