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." */

</lang>

=={{header|Ruby}}==