ampersand (&)
The ampersand separates multiple statements on one line. Statements may be combined until the maximum line length of 511 characters is reached. For example, the following line contains two statements:
ampersand (&)
The ampersand separates multiple statements on one line. Statements may be combined until the maximum line length of 511 characters is reached. For example, the following line contains two statements:
I = 1 & PRINT, 'VALUE: ', I
Delimits string literals and indicates part of an octal or hexadecimal constant. asterisk (*)
In addition to denoting multiplication, designates an ending subscript range equal to the size of the dimension. For example, A(3:*) represents all elements of the vector A except the first three elements.
"at" sign (@)
When the "at" sign is the very first character in a PV-WAVE command line, it causes the compiler to substitute the contents of the command file whose name appears after @. In addition to searching the current directory for the file, PV-WAVE searches a list of locations where procedures are kept. Ends label identifiers. Labels may only be referenced by GOTO and ON_ERROR statements. The following line contains a statement with the label LOOP1:
LOOP1: x = 2.5
The colon also separates the starting and ending subscripts in subscript range specifiers. For example
A(3:6) designates the fourth, fifth, sixth, and seventh elements of the variable A. dollar sign ($)
At the end of a line indicates that the current statement is continued on the following line. The dollar sign character may appear anywhere a space is legal except within a string constant (where it is interpreted literally). Any number of continuation lines are allowed.
exclamation point (!) Begins the names of system-defined variables. System variables are predefined variables of a fixed type. Their purpose is to override defaults for system procedures, to return status information, and to control the action of PV-WAVE.
period or decimal point (.)
Indicates in a numeric constant that the number is of floating-point or double-precision type. Example: 1.0 is a floating-point number. WAVE prompt, the period, if it is the first character on the line, begins an executive command. For example:
WAVE
myfile.pro. If myfile.pro contains a main program, the program will also be executed.However, if the period is not the first character on the line as in the following example,
WAVE
Also, the period precedes the name of a tag when referring to a field within a structure. For example, a reference to a tag called
NAME in a structure stored in the variable A is: A.NAME. quotation mark (")
The quotation mark precedes octal numbers which are always integers and delimits string constants. Examples: "100B is a byte constant equal to 6410, "Don't drink the water." is a string constant.
semicolon (;) Begins a comment field of a statement. All text on a line following a semicolon is ignored by PV-WAVE. A line may consist of just a comment or may contain both a valid statement followed by a comment.
