Posted by elearnschool on Tuesday, March 01, 2016 | No comments
Expressions are phrases that make a worth. JavaScript code
is completed more often than not of expressions in various forms.
Statements are phrase
that don’t generate a worth but as an alternative have some class of side-effect.
Examples of side-effects consist of storing variables in recollection and
jumping to a unlike part of the script. Statements often merge keywords such as
variables (var) if or while with one or more expressions so that the side-effects
have standards to effort through. Firebug makes it easy to distinguish among
expressions and statements. When you enter an expression, it outputs the resulting
value:
1 + 2; 3
When you go through a statement, Firebug doesn’t illustrate
you any output, still if the statement includes a few expressions. That’s why I
have to use console.log () in not many of my examples. This if statement
doesn’t produce a value. Instead, it controls whether to evaluate the block
(the code in curly braces).
if (true)
{
console.log("expression");
}
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