Skip leading space delimiters. Parse name delimited by a space. Create a definition for name with the execution semantics defined below, with an initial value equal to r.

name is referred to as a "f-value".

Place r on the floating point stack. The value of r is that given when name was created, until the phrase "r TO name" is executed, causing a new value of r to be assigned to name.

Assign the value r to name.