String interpolation: Difference between revisions

Revision as of 19:58, 12 May 2023

Revision as of 19:56, 23 May 2023

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String interpolation is an alternative to building string via [[concatenation]], which requires repeat quoting and unquoting;<ref>{{Cite web|url=http://perlmeme.org/howtos/using_perl/interpolation.html|title = Interpolation in Perl |quote="This is much tidier than repeat uses of the '.' concatenation operator."}}</ref> or substituting into a [[printf format string]], where the variable is far from where it is used. Compare:

<syntaxhighlight lang="pythonruby">

apples = 4

print(puts "I have $#{apples} apples.") # string interpolation

print(puts "I have " + String(apples) + " apples.") # string concatenation

print(puts "I have %sd apples.", % apples) # format string

</syntaxhighlight>