The Raster calculator tool provides an array of operators and expressions to perform complex arithmetic and logical operations on single and multiple input rasters. The operators are implemented by syntaxes that define the input, output, and the required operation. A grid calculator expression consists of one or more input grid aliases (for example, Input_1) combined with constants, arithmetic operators, logical and comparison operators and functions.
The calculator statistics functions support band index also. You can also run a calculator operation on a multi-band dataset. You can optionally pass in an array of calculator expressions – one for each band. Then evaluate the appropriate expression for each band's index.