# System Functions

IOR( ) | Logical OR

## Format

IOR(value1[$],value2[$][,ERR=stmtref])
Where:

stmtref | Program line number or statement label to which to transfer control.
value1[$] value2[$] | Compared values. String or numeric expressions/variables. If strings, value1$ must be the same length as value2$.

## Returns

Result of logical 'OR' comparison of two expressions/variables.

## Description

The IOR( ) function performs a bit-wise logical 'OR' comparison of two string or numeric expressions/variables and generates a value as a result. The length of the two string expressions must be equal or PxPlus returns an Error #46: Length of string invalid.

Binary | Result
0 IOR 0 | =0
0 IOR 1 | =1
1 IOR 0 | =1
1 IOR 1 | =1

Therefore:

ior($41$,$42$) | Yields Hex 43 01000011
ior($41$,$25$) | Yields Hex 65 01100101
ior($5A$,$DD$) | Yields Hex DF 11011111

## See Also

XOR( ) Exclusive OR Comparison
AND( ) Logical AND

## Example

0040 read (1,end=1000)F$
0050 R$=ior(F$(1,2),$8080$) ! Turn on high bit
0060 ...