1. September 8th

2. Logical operators
.AND.
.OR.
.NOT.

3. “error handling” Reaching the end of data on input ICOUNT = 0
READ (5,222, END = 72) X
ICOUNT = ICOUNT + 1
FORMAT(I5)
GOTO 5
WRITE (6, 91) ICOUNT
FORMAT
(1X, ‘ The number of values read is ‘, I10)
END =
ERR = label

4. Helpful hints
If input is coming from the keyboard (as in this class), end of file is indicated by a <ctrl> z
Suppose you have an executable called assign2.exe
One way to run it is to type
assign2 <return>
Input will come from the keyboard
Alternatively, you can type
assign2 < some_filename
Input will come from some_filename
Output, by default comes to the screen but you can redirect it to a file using
assign2 > output.txt
assign2 >> output.txt

5. Statement Functions General Form Example
Function name (argument list) = expression
Example
AREA(SIDE1,SIDE2,ANGLE) = 0.5*SIDE1*SIDE2*SIN(ANGLE)
Sample Calls
AREA1 = AREA(X,Y,Z)
AREA2 = AREA (A,B,C)

6. FORTRAN arrays General form Example Stored in column major order
DIMENSION array1(size),array2 (sizeA,sizeB)
Example
DIMENSION ALPHA (10,15),BETA (12)
REAL X(10), INTEGER NUMBER(2,3)
Stored in column major order
Can be passed as parameters but need to pass in size.

7. Early FORTRAN’s array only capable of holding numbers
FORTRAN arrays start at 1
Array subscripts are surrounded by parentheses

8. Reserved words????
Is it legal to say
END = 5.9
DO = 5
IF = 27

9. Is there a maximum integer?
Minimum integer is X =