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MRAB python at mrabarnett.plus.com
Sat Dec 30 19:11:03 EST 2017 
On 2017-12-30 23:22, Gregory Ewing wrote:
> Stefan Ram wrote:
>>   BASIC has
>> 
>> DEF FN...
>> 
>>   which /can/ define actual subroutines, limited to expressions.
>> 
>>   Now, what does this limitation remind me of?
> 
> The equivalent limitation in Python is nowhere near as bad,
> since if you outgrow what lambda can do you can always
> use a def instead. BASIC didn't have that option (unless
> you were using one of the more advanced dialects, such
> as BBC BASIC, which had a PROC statement).
> 
PROC wasn't really a statement, but a prefix for a procedure name. There 
was also another prefix, FN, for functions.

DEF PROChello
print "Hello world!"
ENDPROC

DEF FNsquare(x)
= x * x

They even had LOCAL variables and parameter lists. The Acorn Archimedes 
range had an improved version of BBC BASIC.
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