Check if parent window is iframe or not

How can I tell from a page within an iframe, if the parent itself is also within an iframe?

Explanation:

My home page home.html contains an iframe

<iframe src="sample.html"></iframe>

I need to detect if home.html (ie: parent of sample.html) is within an iframe.

Code in sample.html:

if(self==window)
{
    alert('home.html is not in iframe');
}
else
{
    alert('home.html is in iframe');
}

My question is not a duplicate. It's a different case.

Answers:

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