Next Arguments Arguments are symbols, numbers or sub-expressions. In other contexts, arguments are sometimes called arithmetic operands . In this manual, to avoid confusing them with the instruction operands of the machine language, we use the term argument to refer to parts of expressions only, reserving the word operand to refer only to machine instruction operands.
Numbers are usually integers.
A number can be a flonum or bignum. In this case, you are warned that only the low order 32 bits are used, and as pretends these 32 bits are an integer. You may write integer-manipulating instructions that act on exotic constants, compatible with other assemblers.