>>>>> "ACR" == Arturo C Ramos <arturo_c_ramos@amoco.com> writes: ACR> The following definition ACR> real *8 x /1E15/, y /1D15/ ACR> would not be equal after compiling. ACR> x would have a value of 9.99999987E+14 ACR> while y would have the correct value of 1.0E+15 See the node `Floating-point errors' in the g77 manual concerning floating point equalities.