Matlab, exp function overflow

Question

Can anyone suggest how can I find the largest value for which the function exp in Matlab doesn't overflow, and the smallest for which it overflows.
Thank You!

Answer 1

Trying

T = log(realmax('double'));

exp(T+255*eps)

gives

1.7977e+308

and

exp(T+256*eps)

gives

inf

Answer 2

Try looking at the function realmin() or intmin(). These also have max partners for example:

realmin('double')
realmax('single')
intmin('int8')
intmax('int64')

This tells you the smallest value that that can be represented in the MATLAB type. Any number below this will be set to this min value for the given type.