4Numbers of type real have approximately seven significant digits. The accuracy of the operations described above is determined by the number πœ–  , which is the smallest positive number such that 1+ πœ– > 1  . For a variable x of some type, this number is given by a call to the Fortran intrinsic function epsilon(x). For variables of type real, πœ– β‰ˆ 1.2Γ— 10βˆ’7  and for variables of type real(8) πœ– β‰ˆ 2.2Γ— 10βˆ’16  .