single quotes will escape all escape charater

Not completely: 

print 'there\'s a \' quote here, there\'s a \\ backslash here';

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Anyway, it works the other way around: single quotes interpret only a few escape sequences, double quotes have more (and they interpolate variables).

See the section on "Quote and Quote-like Operators" in perlop.

"What should it profit a man, if he should win a flame war, yet lose his cool?"

In reply to Re^2: To Single Quote or to Double Quote by Joost
in thread To Single Quote or to Double Quote by NateTut

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