Empty string: Difference between revisions
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(Added PicoLisp) |
m (I don't know Tcl but I guess this is a typo) |
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<lang tcl>set s "" |
<lang tcl>set s "" |
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if {$s eq ""} {puts "s contains an empty string"} |
if {$s eq ""} {puts "s contains an empty string"} |
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if {$s ne ""} { |
if {$s ne ""} {puts "s contains a non-empty string"}</lang> |
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There are other ways to check for emptiness and non-emptiness too (though the above are favored for reasons of simplicity, clarity and speed): |
There are other ways to check for emptiness and non-emptiness too (though the above are favored for reasons of simplicity, clarity and speed): |
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<lang tcl>if {[string equal $s ""]} {puts "is empty"} |
<lang tcl>if {[string equal $s ""]} {puts "is empty"} |