Radio Shack TRS-80 PC-3 Owner's Manual page 179

1 EXP numeric expression
EXP is a numeric function which returns the value of e (2.718281828 - the base of the natural logarithms) raised to the value of
the numeric argument. EXP 1 is 2.718281828.
lINT numeric expression
I NT is a numeric function which returns the integer part of its numeric argument. (NT PI is 3.
1
lOG
numeric expression
LOG is a numeric function which returns the logarithm to the base 10 of its numeric argument. LOG 100 is 2.
1
lN
numeric expression
179