HTML font size?? What's the difference with size = "+4" and size = "4"?

  • Thread starter Thread starter FlatsouLx
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FlatsouLx

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i am just confused with the operator symbols in HTML font size..

<font size = +4> Some text </font>
<font size = 4> Some text </font>
<font size = -4> Some text </font>

What's the purpose of putting the plus and the negative sign when its OK if its not present?
 
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