Empty string: Difference between revisions
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print "no empty"
.</syntaxhighlight>
=={{header|ed}}==
ed has no concept of string, only lines. Still, one can empty (or even delete) a line. Checking for emptiness requires conditional matching with <tt>g</tt> and <tt>v</tt>.
<syntaxhighlight lang="sed">
# Empty the string (line)
s/.*//
# Check for emptiness
g/.+/s//Not empty/
v/Not empty/s//Empty</syntaxhighlight>
=={{header|Elena}}==
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