An operand is a data input value in an instruction.
Here is the text reply I got from
www.atomica.com
operand
The part of a machine instruction that references data or a peripheral device. In the instruction, ADD A to B, A and B are the operands (nouns), and ADD is the operation code (verb). In the instruction READ TRACK 9, SECTOR 32, track and sector are the operands.
Problem could be how you are inputting the numbers or is there a space or blank somewhere ??
