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# Local

The verb centigrade uses names `t1`, `t2`, and `t3` in its definition, but if you refer to them outside the verb they are not defined.

       centigrade 32
    0

       t1
    ¦value error

       t1 =. 123
       t1
    123

       centigrade 212
    100

       t1
    123

The use of `t1` inside the definition of centigrade has not conflicted with your use of `t1` outside the definition. The verb centigrade does not define a `t1` outside of itself, as indicated by the value error, and setting a value into its t1 does not change the value of `t1` outside the definition.

The `t1` used inside centigrade is a local name. A local name exists only inside the verb. The `t1` used outside centigrade is a global name. A name defined in the execution of a verb with the copula `=.` is a local name.

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