## Summary

One of the styles for writing expressions, with operations **in-between** the operands (e.g. 6 * 7), as contrasted to *postfix* (e.g. 6 7 *; operations follow operands, as in RPN) and *prefix* (e.g. * 6 7; operations come before operands, as in Tcl in general and Lisp). Infix notation for mathematical expressions is by far the most common, and is in Tcl supported by expr.

## See Also

- [[expr]
- infix