NUM, NUMCHECK

command	return value	value of RC
NUM expression	value of expression or empty string if the evaluation fails	0 error code
NUMCHECK expression	value of expression or empty string if the evaluation fails	0 warning code

Description

The expression will be evaluated numerically, and the result (textual representation) will be returned. The expression may consist of the following parts:

numbers

decimal	123.456, 17.5e3, 100, -312.123, 1e-3
hexa-decimal	0x1234, 0xabc, 0XabC
special constants	pi (=3.1415...) e (=2.71828...) rand (a linear distributed pseudo random number in the range -1..1)

numerical operators

-a (negate), a+b (add), a-b (subtract), a*b (multiply), a/b (divide), a%b (modulo), a^b (power)

logical operators

functions

Notes

• The INT command converts the result to an integer by truncating it. There is no rounding involved, no rounding at all.
• In case of the expression being syntactically ill-formed, an error (INT) or warning (INTCHECK) is reported.

See also

NUM, NUMCHECK, EVAL, EVALCHECK

Examples

#result := int 3.1           // #result is set to 3
#result := int 3.9           // #result is set to 3, too
#result := int 3.9 * 3.9     // #result is set to 15 (note that calculation
                             // is done in floating point, resulting in 15.21,
                             // and truncation occurs only on assigning
// compare the preceding example with the following one:
#result := int 3 * int(3.9)  // here, #result will be assigned 9 - cool, isn't it?