Introduction - Environmental Modeling - page 9

sqrt stands for 'square root' and is a reserved name for a function - more about
functions later.
With MATLAB you can enter operations that are not allowed according to

®

school mathematics:

If there is not a warning, as shown, on your computer, switch on the warning
option, by:

Note that Inf is the value of the 'ans' variable. Infinity is thus a value and be
used as such:

or:

but:

NaN stands for 'Not a Number'; remember that

1=1 has no unique value. Try

also the following expressions:

Standard output has few significant digits. With

one can switch to a representation with more digits. Try it with pi now! Note
that this concerns only how values are displayed on the screen. Internally the