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1.2.9. The Variable 'It'
When CoCoA evaluates an expression, the result is usually assigned to
the special CoCoA variable named 'It'.

Example

1+1;
2
-------------------------------
It;
2
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It+1;
3
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It;
3
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X := 17;  -- 'It' is not changed if there is no output
It;
3
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X+It;
20
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