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# The Infix Operator

This is a good time to introduce the

**infix operator**that helps us make code a bit more readable. Normally, we apply a function by writing`<FUNCTION> <ARGUMENT1> <ARGUMENT2>`

, but we could also write it using the infix operator as `<ARGUMENT1> `<FUNCTION>` <ARGUMENT2>`

. This way, we make the code more readable – for example, in the case of`res = mod sum 2`

, we can instead write:res = sum `mod` 2 -- using the infix operator ``

Which then reads as "

`res`

is equal to `sum modulo 2`

". Note that the infix operator can be used this way for **functions that take in two arguments**. For functions with more than two arguments, we would need to add parentheses to explicitly create expressions (which return another function – currying):ghci> multiply x y z = x * y * z

ghci> (1 `multiply` 2) 3

6