Remote Processing BASIC 52 - Manual (Page 81)

RPBASIC-52 PROGRAMMING GUIDE
2-62
LOG
Syntax: L O G (expr)
Function: Returns the n atural logarithm (base "e") of expr which must evaluate to greater than zero. Calculated
to seven significant digits.
Mode: Comm and, run
Use: PRINT LOG (COS(0 ))
Cards: All
ERRORS
A R I T H . U N D E R F L O W expr or result is less than RPBASIC-52's smallest floating-point value of ± 1E-127
A R I T H . O V E R F L O W expr or result is greater than R PBA SIC-52's largest floatin g point value of ±
.99999999E+127
B A D A R G U M E N T Attemp t to take LO G() of zero
EXAMPLE
100 PRINT EXP(-200), LOG(1.383901E-87)
>run
1.383901 E-87 -200