operators, expressions, + - * / ^ () ^ - (negation) * / + - ; variables and assignment = equals assignment == equals equals constants pi i,j inf NaN help who whos ellipsis format built-in functions sin, cos, tan, exp, log, log10, log2, asin, acos, atan, random number vectors linspace colon operator element extraction elementwise operations semicolon pointwise operations plotting plot(x,sin(x)) plot(x,sin(x),'r') plot(x,tan(x)) semilogy semilogx loglog type "double precision" "single precision" int8, int16, in32, int64 char logical complex bits and bytes