Examples of Potential Numbers

As examples, the tokens in Figure 2–10 are potential numbers, but they are not actually numbers, and so are reserved tokens; a conforming implementation is permitted, but not required, to define their meaning.

  1b5000                       777777q                1.7J  -3/4+6.7J  12/25/83     27^19 3^4/5 6//7 3.1.2.6 ^-43^   3.141_592_653_589_793_238_4  -3.7+2.6i-6.17j+19.6k  

The tokens in Figure 2–11 are not potential numbers; they are always treated as symbols:

  /     /5     +  1+  1-        foo+  ab.cd  _  ^   ^/-

The tokens in Figure 2–12 are potential numbers if the current input base is 16, but they are always treated as symbols if the current input base is 10.

  bad-face  25-dec-83  a/b  fad_cafe  f^