realmax

Purpose

Largest positive floating-point numbers.

n = realmax

realmax is the largest floating-point number representable on a particular computer. Anything larger overflows.

On machines with IEEE floating-point format, realmax is one bit less than 2^1024 or about 1.7977e+308.

realmax is pow2(2-eps,maxexp) where maxexp is the largest possible floating-point exponent.

Execute type realmax to see maxexp for various computers.