Re: What is the difference between a Statement and an Expression?

Lets look at a little grammar for a simple compiler perhaps this will help.

expression -> expression + term
              | expression - term
              | term

statement-> id = expression 
              | if expression  then statement
              | while expression do statement
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Notice that in my language grammar (taken directly out of he 'Red Dragon' Compiler Book, Aho, Sethi, Ullman). Statements always begin with either a identifier or a keyword.

$x = 1+1; <--- statement starts with an identifier x followed by an expression 1+1 </code>

mitd-Made in the Dark
'My favourite colour appears to be grey.'

Comment on Re: What is the difference between a Statement and an Expression? Download Code

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Re^2: What is the difference between a Statement and an Expression? by JavaFan (Canon) on Mar 02, 2012 at 01:15 UTC
Statements always begin with either a identifier or a keyword. That's not true for Perl: `1 == $variable or next;` [download] It's also not true for C. `3;` [download] is a valid, although useless, statement.	[reply] [d/l] [select]