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Symbol  Format  Data 

−  Code Point 
U+2212 
TeX 
 

SVG 
The minus symbol is used in math to represent subtraction. Typically, the symbol is used in an expression like this:
In plain language, this expression represents minus .
Note, the code point of this character is different from the hyphen symbol () on the keyboard even though they are usually used to mean the same thing.
The hyphen symbol is used in math as the subtraction operator when entering input using a keyboard.
Subtraction is a basic arithmetic operation of taking away one number from another number.
The minus symbol is used in set theory to represent the difference operator for two sets. The operation removes all elements found in one set from another and returns the resulting set.