System Procedures and Functions A-L

  Func/Proc  │F or P│ What it does
 ════════════╪══════╪═══════════════════════════════════════════════════════
  Abs        │ Func │ Returns the absolute value of the argument
  Addr       │ Func │ Returns the address of a specified object
  Append     │ Proc │ Opens an existing file for appending
  ArcTan     │ Func │ Returns the arctangent of the argument
  Assign     │ Proc │ Assigns the name of an external file to a file
             │      │ variable
  Assigned   │ Func │ Tests to determine if a pointer or procedural variable
             │      │ is nil
  BlockRead  │ Proc │ Reads one or more records into a variable
  BlockWrite │ Proc │ Writes one or more records from a variable
  Break      │ Proc │ Terminates a for, while, or repeat statement
  ChDir      │ Proc │ Changes the current directory
  Chr        │ Func │ Returns a character with a specified ordinal number
  Close      │ Proc │ Closes an open file
  Concat     │ Func │ Concatenates a sequence of strings
  Continue   │ Proc │ Continues a for, while, or repeat statement
  Copy       │ Func │ Returns a substring of a string
  Cos        │ Func │ Returns the cosine of the argument (x is an angle, in
             │      │ radians)
  CSeg       │ Func │ Returns the current value of the CS register
  Dec        │ Proc │ Closes an open file
  Delete     │ Proc │ Deletes a substring from a string
  Dispose    │ Proc │ Disposes of a dynamic variable
  DSeg       │ Func │ Returns the current value of the DS register
  Eof        │ Func │ Returns the end-of-file status
  Eoln       │ Func │ Returns the end-of-line status of a text file
  Erase      │ Proc │ Erases an external file
  Exit       │ Proc │ Exits immediately from the current block
  Exclude    │ Proc │ Excludes an element from a set
  Exp        │ Func │ Returns the exponential of the argument
  FilePos    │ Func │ Returns the current file position of a file
  FileSize   │ Func │ Returns the current size of a file
  FillChar   │ Proc │ Fills a specified number (count) of contiguous bytes
             │      │ with a specified value (can be type Byte or Char)
  Flush      │ Proc │ Flushes the buffer of a text file open for output
  Frac       │ Func │ Returns the fractional part of the argument
  FreeMem    │ Proc │ Disposes of a dynamic variable of a given size
  GetDir     │ Proc │ Returns the current directory of specified drive
  GetMem     │ Proc │ Creates a dynamic variable of the specified size and
             │      │ puts the address of the block in a pointer variable
  Halt       │ Proc │ Stops program execution and returns to the operating
             │      │ system
  Hi         │ Func │ Returns the high-order byte of the argument
  High       │ Func │ Returns the highest value in the range of the argument
  Inc        │ Proc │ Increments a variable
  Include    │ Proc │ Includes an element from a set
  Insert     │ Proc │ Inserts a substring into a string
  Int        │ Func │ Returns the integer part of the argument
  IOResult   │ Func │ Returns the status of the last I/O operation performed
  Length     │ Func │ Returns the dynamic length of a string
  Ln         │ Func │ Returns the natural logarithm of the argument
  Lo         │ Func │ Returns the low-order Byte of the argument
  Low        │ Func │ Returns the lowest value in the range of the argument

  System Procedures and Functions M-R 
  System Procedures and Functions S-Z