Variables that are declared inside a block but used outside of it (which is possible with a ``++var++``-style declaration) should be declared outside the block.


== Noncompliant Code Example

----
function doSomething(a, b) {
  if (a > b) {
    var x = a - b;  // Noncompliant
  }

  if (a > 4) {
    console.log(x);
  }

  for (var i = 0; i < m; i++) { // Noncompliant, both loops use same variable
  }

  for (var i = 0; i < n; i++) {
  }

  return a + b;
}
----


== Compliant Solution

----
function doSomething(a, b) {
  var x;

  if (a > b) {
    x = a - b; 
  }

  if (a > 4) {
    console.log(x);
  }

  for (let i = 0; i < m; i++) {
  }

  for (let i = 0; i < n; i++) {
  }


  return a + b;
}
----



ifdef::env-github,rspecator-view[]

'''
== Implementation Specification
(visible only on this page)

include::message.adoc[]

include::highlighting.adoc[]

'''
== Comments And Links
(visible only on this page)

include::comments-and-links.adoc[]
endif::env-github,rspecator-view[]