2.61. reftest4.bas

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This sample demonstrates the difference between undef a and a = undef.

Example reftest4.bas :

' Set b to be 12
b = 12
' a becomes the same as b
ref a = b
' b is already the same as a
ref b = a
' b is undefed, but a retains the value
undef b
print a," = 12\n"
undef a

b = 12 ref a = b ref b = a ' this does not brake the reference, but assigns undef to b (and a) b = undef print a," = undef\n"

Result executing reftest4.bas :

Possible error messages sent to stderr:


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