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Getting started 41
To reuse the last
result
Press S+ (Ans) to
retrieve your last answer
for use in another
calculation. Ans
appears on the entry
line. This is a shorthand for your last answer and it can be
part of a new expression. You could now enter other
components of a calculation—such as operators, number,
variables, etc.—and create a new calculation.
TIP
You don’t need to first select Ans before it can be part of
a new calculation. If you press a binary operator key to
begin a new calculation, Ans is automatically added to
the entry line as the first component of the new
calculation. For example, to multiply the last answer by
13, you could enter
S+ s13E. But the
first two keystrokes are unnecessary. All you need to enter
is s13E.
The variable Ans is always stored with full precision
whereas the results in history will only have the precision
determined by the current Number Format setting (see
page 31). In other words, when you retrieve the number
assigned to Ans, you get the result to its full precision; but
when you retrieve a number from history, you get exactly
what was displayed.
You can repeat the previous calculation simply by pressing
E. This can be useful if the previous calculation
involved Ans. For example, suppose you want to calculate
the nth root of 2 when n is 2, 4, 8, 16, 32, and so on.
1. Calculate the square root of 2.
Sj2E
2. Now enter √Ans.
SjS+E
This calculates the fourth root of 2.