Statement modifiers are not nestable. But since 

do { ... } for ...;

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is legal, so is 
do { ... for ... } for ...;

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But for readability's sake, just don't do that! Especially since 

while (...) { ...}

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and 

do { ...} while ...;

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have different semantics.

A functional language approach would probably achieve what you want better. 

print map ord, split //, `cat file.pl`;

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(Yeah, the outer loop is useless, as you can see.)

In reply to Re: Multiple foreach loops in single statement by ikegami
in thread Multiple foreach loops in single statement by gurpreetsingh13

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