| **Navigation:**  [[introduction.htm|Language Reference]] > 3 - Variable Declarations > Data Types >====== REAL (eight-byte signed floating point) ====== | [[sreal four byte signed floating point .htm|{{btn_prev_n.gif|Previous page}}]][[introduction.htm|{{btn_home_n.gif|Return to chapter overview}}]][[bfloat4 four byte signed floating point .htm|{{btn_next_n.gif|Next page}}]] | | || | label **REAL(**[//initial value//]**) **[,**DIM( )**] [,**OVER( )**] [,**NAME( )**] [,**EXTERNAL**] [,**DLL**] [,**STATIC**] [,**THREAD**] || | | [,**AUTO**] [,**PRIVATE**] [,**PROTECTED**] | {{blk2blue.jpg|blk2blue.jpg}} | **REAL** | An eight-byte floating point number. | **Format:  ±    exponent         significand** **       | . | ........... | ..................... |** ** Bits:63  62             52                      0** **Range: 0, ± 2.225073858507201e-308 .. ± 1.79769313496231e+308** **(15 significant digits)** | //initial value// | A numeric constant. If omitted, the initial value is zero, unless the AUTO attribute is present. | | **DIM** | Dimension the variable as an array. | | **OVER** | Share a memory location with another variable. | | **NAME** | Specify an alternate, "external" name for the field. | | **EXTERNAL** | Specify the variable is defined, and its memory is allocated, in an external library. Not valid within FILE, QUEUE, or GROUP declarations. | | **DLL** | Specify the variable is defined in a .DLL. This is required in addition to the EXTERNAL attribute. | | **STATIC** | Specify the variable's memory is permanently allocated. | | **THREAD** | Specify memory for the variable is allocated once for each execution thread. Also implicitly adds the STATIC attribute on Procedure Local data. | | **AUTO** | Specify the variable has no //initial value//. | | **PRIVATE** | Specify the variable is not visible outside the module containing the CLASS methods. Valid only in a CLASS. | | **PROTECTED** | Specify the variable is not visible outside base CLASS and derived CLASS methods. Valid only in a CLASS. | **REAL** declares an eight-byte floating point signed numeric variable, using the Intel 8087 long real (double precision) format. **Example:** **Count1 REAL                         !Declare eight-byte signed floating point** **Count2 REAL,OVER(Count1)            !Declare OVER the eight-byte** **                                    !signed floating point** **Count3 REAL,DIM(4)                  !Declare it an array of 4 reals** **Count4 REAL(5)                      !Declare with initial value** **Count5 REAL,EXTERNAL                !Declare as external** **Count6 REAL,EXTERNAL,DLL            !Declare as external in a .DLL** **Count7 REAL,NAME('SixCount')        !Declare with external name** **ExampleFile FILE,DRIVER('Clarion')  !Declare a file** **Record       RECORD** **Count8        REAL,NAME('Counter')  !Declare with external name** **             END** **            END**