The format command controls how numbers are output. For
example format long g will display 15 digits in either exponential or
fixed format, which ever it thinks best.
Finishing a command or variable initialisation with a semi-colon
suppresses the output,
You can display the contents of an array just by typing its name (without a semi-colon) but that will display the array name too. Particularly if
the array's a string the disp command is useful - it suppresses the
printing of the array name.