format — change the number/variable format
% some formats: short (default), short e, long, long e, bank
x = pi;
format short % default format
x
x = 3.1416
format short e % scientific notation, short
x
x = 3.1416e+00
format long % much more precision
x
x = 3.141592653589793
format long e
x
x = 3.141592653589793e+00
format bank % two decimals, currency
x
format short % back to default
x = 3.14