Editing String literal (section)

===Dual quoting===
Some languages, such as [[Fortran]], [[Modula-2]], [[JavaScript]], [[Python (programming language)|Python]], and [[PHP]] allow more than one quoting delimiter; in the case of two possible delimiters, this is known as '''dual quoting'''. Typically, this consists of allowing the programmer to use either single quotations or double quotations interchangeably – each literal must use one or the other.

<syntaxhighlight lang="python">
  "This is John's apple."
  'I said, "Can you hear me?"'
</syntaxhighlight>

This does not allow having a single literal with both delimiters in it, however. This can be worked around by using several literals and using [[string concatenation]]:
<syntaxhighlight lang="python">
  'I said, "This is ' + "John's" + ' apple."'
</syntaxhighlight>
Python has [[string literal concatenation]], so consecutive string literals are concatenated even without an operator, so this can be reduced to:
<syntaxhighlight lang="python">
  'I said, "This is '"John's"' apple."'
</syntaxhighlight>