Chapter 5: DISGCL Commands

This chapter describes several DISGCL commands.

5.1 Termination of DISGCL

The command EXIT terminates a DISGCL session.

The call is: EXIT

5.2 Getting Help

The HELP command activates a menu for getting help.

The call is: HELP

5.3 Including DISGCL Files

A DISGCL file can be included into another DISGCL file or DISGCL session with the statement

INCLUDE 'file[.gcl]'

Additional notes:

5.4 Listing Variables

The command LIST list all defined variables.

The call is: LIST [option] [v1, v2, ..., vn]

option can have the values -s and -u. If -s is used, only system variables are listed, if -u is used, only user-defined variables are listed.
v1, v2, .., vn are the names of variables. If no variables are specified, all defined variables are listed.

5.5 Freeing Variables

The command FREE deallocates the space allocated by arrays and strings.

The call is: FREE v1, v2, ..., vn

v1, v2, .., vn are the names of variables.

5.6 The PRINT Command

The command PRINT prints the value of an expression on the screen.

The call is: PRINT expr1, expr2, ..., exprn

expr1, expr2, .., exprn are expressions.

5.7 Logging Commands

The command LOGON defines a file where interactive commands will be logged.

The call is: LOGON cfil

cfil is a string containing a filename.

Additional notes:

5.8 Creating Arrays

The commands BYTE, CHAR, INT, SHORT, FLOAT, DOUBLE and COMPLEX create corresponding arrays and initialize them with zeros.

The call is: FLOAT list

list is a list of arrays with dimension specifications separated by commas.

Example: FLOAT A[10], B[5,10] creates an array A with 10 elements and a matrix B with 5 rows and 10 columns.

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