View source for Infinity

<p>The two infinities are now valid values to be used as the upper and lower numeric limits.  The infinity symbol (<apll>∞</apll>) is entered from the keyboard using the key combination '''Alt-f'''.  The other infinity is obtained from the positive form by preceding it with a negative symbol (<apll>¯∞</apll>).</p>  

<p>For example,</p>

<apll><pre>
      ⌊/⍬
∞
      ⌈/⍬
¯∞
      9*999
∞
      ÷0
∞
      ÷¯∞ ∞
0 0
      ('&lt;',a),a⍪a∘.&lt;a←¯∞ 0 ∞
  &lt; ¯∞ 0 ∞
 ¯∞  0 1 1
  0  0 0 1
  ∞  0 0 0
</pre></apll>

<p>Also, see the description of the system variable [[System Variable IC|<apll>⎕IC</apll>]] (Indeterminate Control) for a way to control how infinity along with other indeterminates are handled.


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