RosettaCodeData/Task/Real-constants-and-functions/Octave/real-constants-and-functions.octave

e         % e
pi        % pi
sqrt(pi)  % square root
log(e)    % natural logarithm
exp(pi)   % exponential
abs(-e)   % absolute value
floor(pi) % floor
ceil(pi)  % ceiling
e**pi     % power