Problem with big real constant and parameter statement : Fortran

This is a discussion on Problem with big real constant and parameter statement within the Fortran forums in Programming Languages category; Hi, I have to write a little program in Fortran77 which tells what is the biggest number factorizable with the differents data types (integer, real and real*8) I'm using Fortran Power Station 4.0 . This is a little piece of how I thought to write it avoiding a floating point overflow Code: parameter(real_max_value=3.4028234E+38) sfatt=1 n=1 120 if( real_max_value/sfatt .GE. n+1) then n=n+1 sfatt=sfatt*n goto 120 endif real_max_value should be the biggest number which can be represented with real data type. But even if I use: Code: parameter(real_max_value=3.4028234E+38) it assumes the 0 value and I don't know the why. I think ...