Open Watcom FORTRAN 77 Language Reference

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Language Reference c r is a constant or the symbolic name of a constant is an unsigned positive integer constant or the symbolic name of a constant. This form of the DOUBLE PRECISION statement is an extension to the FORTRAN 77 language. The rules for data initialization are the same as for the DATA statement. Example: DOUBLE PRECISION A/4D4/, B(10)/10*5D1/ In the previous example, A is initialized with the double precision constant 4D4 and each element of the array B is initialized with the double precision constant 5D1. 52 DOUBLE PRECISION Statement
FORTRAN Statements 2.23 DO WHILE Statement DO [s[,]] WHILE (e) [: block-label] where: s e block-label is an optional statement label of an executable statement, called the terminal statement, which follows the DO statement in the same program unit. is a logical expression or integer arithmetic expression, in which case the result of the integer expression is compared for inequality to the integer value 0. is an optional block label. The DO WHILE statement is an extension to the FORTRAN 77 language. Example: X = 0.0 DO 10 WHILE( X .LT. 100.0 ) PRINT *, X, SQRT( X ) X = X + 1.0 10 CONTINUE If no statement label is present, the terminal statement of the DO-loop must be an END DO statement. Example: X = 0.0 DO WHILE( X .LT. 100.0 ) PRINT *, X, SQRT( X ) X = X + 1.0 ENDDO The following example illustrates the use of an integer arithmetic expression. Example: I = 10 DO WHILE( I ) PRINT *, I I = I - 1 ENDDO END The DO WHILE statement, is similar to the DO statement. All nesting rules that apply to the DO statement also apply to the DO WHILE statement. The difference is the way in which the looping is accomplished; the DO-loop is executed while the logical expression of the DO WHILE statement has a true value or until control is transferred out of the DO-loop. For more information, see the chapter entitled "Program Structure Control Statements" on page 193. DO WHILE Statement 53
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Open Watcom FORTRAN 77 Language Ref
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Preface Open Watcom FORTRAN 77 is a
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Table of Contents 2.25 ELSE IF Stat
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Table of Contents 3.4.10 Hexadecima
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Table of Contents 11.7 Editing ....
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Table of Contents 12.6.1 ENTRY Stat
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Page 16 and 17: Language Reference 1.3 Source Progr
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Page 24 and 25: Language Reference 2.3 ADMIT Statem
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Page 30 and 31: Language Reference 2.6 AT END State
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Page 38 and 39: Language Reference 2.11 CHARACTER S
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Page 44 and 45: Language Reference Example: REAL A,
Page 46 and 47: Language Reference a (d) len is an
Page 48 and 49: Language Reference 2.15 CONTINUE St
Page 50 and 51: Language Reference 2.17 DATA Statem
Page 52 and 53: Language Reference 2. As an extensi
Page 54 and 55: Language Reference 2.18 DEALLOCATE
Page 56 and 57: Language Reference 2.19 DIMENSION S
Page 58 and 59: Language Reference Transfer of cont
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Page 66 and 67: Language Reference 2.24 ELSE Statem
Page 68 and 69: Language Reference 2.26 END Stateme
Page 70 and 71: Language Reference 2.28 END BLOCK S
Page 72 and 73: Language Reference 2.30 ENDFILE Sta
Page 74 and 75: Language Reference 2.31 END GUESS S
Page 76 and 77: Language Reference 2.33 END LOOP St
Page 78 and 79: Language Reference 2.35 END SELECT
Page 80 and 81: Language Reference 2.37 END UNION S
Page 82 and 83: Language Reference 2.39 ENTRY State
Page 84 and 85: Language Reference The following ex
Page 86 and 87: Language Reference 2.42 EXIT Statem
Page 88 and 89: Language Reference 2.44 FORMAT Stat
Page 90 and 91: Language Reference 2.45.2 Extended
Page 92 and 93: Language Reference 2.47 Computed GO
Page 94 and 95: Language Reference * Illegal use of
Page 96 and 97: Language Reference 2.50 Arithmetic
Page 98 and 99: Language Reference An example of an
Page 100 and 101: Language Reference IF( I .EQ. 10 )T
Page 102 and 103: Language Reference 2.53.3 IMPLICIT
Page 104 and 105: Language Reference 2.54 INCLUDE Sta
Page 106 and 107: Language Reference Example: LOGICAL
Page 108 and 109: Language Reference It is assigned t
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Language Reference 2.57 INTRINSIC S
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Language Reference a (d) len is an
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Language Reference 2.59 LOOP Statem
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Language Reference 2.61 NAMELIST St
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Language Reference Example: &PERSON
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Language Reference FILE = fin fin i
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Language Reference Notes: 1. If the
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Language Reference 2.64 PARAMETER S
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Language Reference 2.66 PRINT State
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Language Reference Example: PRINT 1
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Language Reference 2.68 QUIT Statem
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Language Reference 2. An internal f
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Language Reference Example: READ( 8
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Language Reference a (d) len is an
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Language Reference 2.71 RECORD Stat
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Language Reference 2.73 RETURN Stat
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Language Reference Notes: 1. The un
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Language Reference PROGRAM MAIN . .
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Language Reference Example: SELECT
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Language Reference 2.78 STRUCTURE S
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Language Reference 2.80 UNION State
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Language Reference 2.82 VOLATILE St
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Language Reference 2.84 WHILE State
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Language Reference REC = rn IOSTAT
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Language Reference 150
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Language Reference Example: DO10I=1
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Language Reference 123.764 .4352344
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Language Reference Actually, holler
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Language Reference 158 Symbolic Con
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Language Reference [lo:] hi where:
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Language Reference 4.4 Classifying
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Language Reference 4.5 Classifying
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Language Reference Example: CHARACT
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Language Reference STRUCTURE /PERSO
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Language Reference SUBROUTINE PRINT
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Language Reference 172 Unions
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Language Reference Operator Arithme
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Language Reference 7.1.3 Arithmetic
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Language Reference 7.2 Character Ex
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Language Reference where: relop is
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Language Reference Note that the op
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Language Reference 1. logical term
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Language Reference 186 Constant Exp
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Language Reference 8.3 Logical Assi
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Language Reference 8.6 Extended Ass
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Language Reference 192 Extended Ass
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Language Reference Examples follow
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Language Reference 9.4 DO - END DO
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Language Reference The next example
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Language Reference where: stmt is a
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Language Reference Example: * Illeg
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Language Reference - the string -10
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Language Reference 9.12 GUESS-ADMIT
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Language Reference 9.13 QUIT QUIT [
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Language Reference Example: LOOP RE
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Language Reference READ statement t
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Language Reference 214 Notes on Str
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Language Reference 10.3 Records FOR
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Language Reference accessed directl
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Language Reference Example: WRITE(1
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Language Reference 5. Any character
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Language Reference 224 Printing of
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Language Reference Example: REAL X
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Language Reference 11.6 Nonrepeatab
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Language Reference Example: PRINT
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Language Reference Example: INTEGER
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Language Reference 11.7.10.4 E and
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Language Reference n Example: is 4
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Language Reference and is read into
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Language Reference 3. An input item
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Language Reference 1. Blanks are ne
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Language Reference e is an expressi
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Language Reference Example: * Illeg
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Language Reference 12.3.2 Type Conv
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Language Reference 12.3.7 Type Conv
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Language Reference 12.3.13 Remainde
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Language Reference 12.3.18 Choosing
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Language Reference 12.3.24 Square R
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Language Reference 12.3.28 Sine Def
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Language Reference 12.3.33 Arccosin
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Language Reference 12.3.38 Gamma Fu
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Language Reference 12.3.45 Lexicall
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Language Reference Definition: Name
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Language Reference 12.3.53 Binary P
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Language Reference 12.3.58 Allocate
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Language Reference Example: INTEGER
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Language Reference 2. An array name
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Language Reference 5. A name that a
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Language Reference 12.8.1 Dummy Arg
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Language Reference Example: DIMENSI
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Language Reference 282 Subprogram A
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Appendices 284
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Appendices 10. The DOUBLE COMPLEX s
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Appendices 36. Non-character arrays
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Index AMAX1 253 AMIN0 254 $ AMIN1 2
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Index DATAN 260 dummy procedure 280
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Index AINT 250 ANINT 251 ASIN 259 H
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Index DREAL 249 IAND 264 DSIGN 252
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Index RETURN 32, 46, 56, 121, 132,
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Open Watcom FORTRAN 77 Language Reference

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