Editing Equals sign (section)

{{Short description|Mathematical symbol of equality}}
{{About|the symbol|the concept of equality in mathematics|Equality (mathematics)}}
{{Redirect-several|dab=no|Double hyphen|Glossary of mathematical symbols#Equality, equivalence and similarity{{!}}Mathematical symbols § Equality}}
{{Infobox symbol
|mark={{=}}
|unicode = {{unichar|3D|Equals sign|html=}}
|see also = {{unichar|2260|Not equal to|nlink=}}<br />{{unichar|2248|almost equal to|nlink=}} <br />{{unichar|2261|identical to|nlink=Triple bar}}
}}
[[Image:2+2.svg|thumb|right|200px|A well-known [[Equality (mathematics)|equality]] featuring the equal sign]] 
The '''equals sign''' ([[British English]]) or '''equal sign''' ([[American English]]), also known as the '''equality sign''', is the [[mathematical symbol]] '''{{char|1==}}''', which is used to indicate [[equality (mathematics)|equality]].<ref>{{Cite web |last=Weisstein |first=Eric W. |title=Equal |url=https://mathworld.wolfram.com/Equal.html |access-date=2020-08-09 |website=mathworld.wolfram.com |language=en |archive-date=2020-09-14 |archive-url=https://web.archive.org/web/20200914232729/https://mathworld.wolfram.com/Equal.html |url-status=live}}</ref> In an [[equation]] it is placed between two [[expression (mathematics)|expressions]] that have the same value, or for which one studies the conditions under which they have the same value.

In [[Unicode]] and [[ASCII]] it has the [[code point]] U+003D.<ref>{{cite web |title=C0 Controls and Basic Latin Range: 0000–007F |url=https://www.unicode.org/charts/PDF/U0000.pdf |page=0025{{snd}}0041 |publisher=Unicode Consortium |access-date=2021-03-29 |archive-date=2016-05-26 |archive-url=https://web.archive.org/web/20160526182105/http://www.unicode.org/charts/PDF/U0000.pdf |url-status=live }}</ref> It was invented in 1557 by the Welsh mathematician [[Robert Recorde]].