x*y*z, x×y×z, or x y z
represents a product of terms.
- The character × is entered as * or \[Times]. It is not the same as \[Cross].
- Times has attributes Flat, Orderless, and OneIdentity.
- The default value for arguments of Times, as used in x_. patterns, is 1.
- Times is taken to be 1.
- Times[x] is x.
- 0x evaluates to 0, and 0.0x evaluates to 0.0.
- Unlike other functions, Times applies built‐in rules before user‐defined ones. As a result, it is not possible to make definitions such as 2*2=5.
Background & Context
- Times is a function that does multiplication (takes the product) of expressions. The expression Times[a,b,c,…] is commonly represented using the shorthand syntax a*b*c*…, a×b×c×…, or simply a b c …. Special cases include Times, which is taken to be 1, and Times[x], which is taken to be x.
- Times sorts its arguments and collapses any terms of the same type. Times also threads element-wise over lists. Expand can be used to expand out products of expressions not automatically multiplied out by Times.
- TimesBy can be used to multiply the value of a given variable. Divide gives the division of two expressions.
- Multiplication of a function over a range or list of arguments is done using the function Product. Other types of multiplication include Dot (for matrix or vector multiplication) and NonCommutativeMultiply (for non-commuting products).
Examplesopen allclose all
Basic Examples (3)
Introduced in 1988
|Updated in 1996