=.html -- ACL2 Version 6.3

### =

test equality of two numbers

    Major Section:  ACL2-BUILT-INS

`(= x y)` is logically equivalent to `(equal x y)`.

Unlike `equal`, `=` has a guard requiring both of its arguments to be numbers. Generally, `=` is executed more efficiently than `equal`.

For a discussion of the various ways to test against 0, See zero-test-idioms.

`=` is a Common Lisp function. See any Common Lisp documentation for more information.