RosettaCodeData/Task/Determine-if-a-string-is-numeric/Fortran/determine-if-a-string-is-numeric.f

FUNCTION is_numeric(string)
  IMPLICIT NONE
  CHARACTER(len=*), INTENT(IN) :: string
  LOGICAL :: is_numeric
  REAL :: x
  INTEGER :: e
  READ(string,*,IOSTAT=e) x
  is_numeric = e == 0
END FUNCTION is_numeric