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Notes on iapl for msdos
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iapl ?        display help

iapl /x       start with apl ega graphics

iapl /a       start in ascii mode

A _ s 2 3 r i6
              assign A the numbers 1 to 6 in a 2x3 matrix
              s means transposition, r is rho and i is itoa
              note that s r and i are actually shifted characters
              
`1            negative 1                   

)CLEAR        clears workspace

)FNS          list all functions

)LIB	      list all workspace names

)LOAD TUTORIAL
              runs tutorial
              includes functions:
              ASK ASKYN AV COL FACTORIAL FIB IOTA MAT NUB ODDS
              OVER QLX SHOW SQU TRI WHERE

)LOAD USEFUL
              WSDOC  list functions in workspace
              DDDOC  display all functions
              CMD 'DIR'  execute dos command DIR
              CMD ''     drop to dos shell

)LOAD NEWS

)LOAD DDDEMO  runs demo

)OFF          exit iapl 

!4	      returns 24 (factorial of 4)
2 ! 4         choose 2 from 4, i.e. 6 (also known as binomial coefficient)
3*2           returns 9 (* is exponent)

missing
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)HELP       
use HELP 'TOPIC' instead 
e.g. HELP 'USEFUL' gives help on workspace USEFUL

keys
----

shift 2 gives goto
shift 3 gives quad
shift 4 gives del
shift 5 gives divide
shift 7 gives quote quad
shift - gives assign

shift i gives iota
shift j gives jot
shift m gives domino
shift x gives multiply