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The plus sign (+) means "ADD" in programming and on calculator keyboards. For example, 10 + 7 means 10 added to 7. It is also used as a concatenation symbol for text fields.
The plus sign has even developed new cachet in casual communication, as breezy shorthand for adding people to email chains ... For example: “War is expensive, ...
The use of the plus sign goes back to at least 1984, when the French television channel Canal+ made its debut. Google was part of the trend from 2011 to 2019 , with its Google+ social network .