Undefined values: Difference between revisions
→{{header|Perl}}: Be more specific in the printing.
(added ruby partially) |
(→{{header|Perl}}: Be more specific in the printing.) |
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# Check to see whether it is defined
print "var
# Give it a value
Line 17:
# Check to see whether it is defined after we gave it the
# value "Chocolate"
print "var
# Give the variable an undefined value.
Line 26:
# Check to see whether it is defined after we've explicitly
# given it an undefined value.
print "var
# Give the variable a value of 42
Line 33:
# Check to see whether the it is defined after we've given it
# the value 42.
print "var
# Because most of the output is conditional, this serves as
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