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Empty string: Difference between revisions
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=={{header|REXX}}==
<lang rexx>/*how to assign empty string, & then check for empty/not-empty strings.*/▼
▲/*how to assign empty string, & then check for empty/not-empty strings.*/
/*─────────────── 3 simple wats to assign an empty string to a variable.*/
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ide="" /*uses two quotes, sometimes called a double quote.*/
doe= /*... nothing at all. */
/*─────────────── assigning multiple null values to vars, 2 methods are:*/
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parse value 0 with . ant ape ant imp fly tui paa elo dab cub bat ayu
/*where the value of zero is skipped, the rest set to null.*/
/*─────────────── how to check that a string is empty, several methods: */
if cat=='' then say "the feline is not here."
if pig=="" then say 'no ham today'
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nit='' /*assign an empty string to a lice egg.*/
if cow==nit then say 'the cow has no milk today.'
/*─────────────── how to check that a string isn't empty, several ways: */
if dog\=='' then say "the dogs are out!"
/*most REXXes support the "not" character.*/
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if length(cod)\=0 then fish=cod /*not-so-fast compare.*/
/*────────────────────────── anyway, as they say. "choose your poison." */</lang>▼
▲/*────────────────────────── anyway, as they say. "choose your poison." */
=={{header|Ruby}}==
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