String literals are documented in the section "Quote and Quote-like Operators" of perlop.

printf format strings are documented under sprintf in perlfunc, as indicated under printf in perlfunc.

In reply to Re^3: Obfuscation or printing words like \160\162\151\156\164 by ikegami
in thread Obfuscation or printing words like \160\162\151\156\164 by jbrugger

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