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Notes for the [bc(1)] arbitrary precision calculator
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!!Handy Variables

!scale

Defines how some operations use digits after the decimal point . (Default 0)
So if you type ''5/5'' ''bc'' interprets this as 5.00000/5.00000. and the answer is 1.00000

!last

A variable that has the value of the last printed number.
So if you have a running total in ''bc'' of 100, then last+10 would result in 110.

!ibase

Define the conversion base for input numbers.

!obase

Define the conversion base for output numbers.

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!!Common Operations

!Input numbers with a particular base but output them in a different base.

Say we want to add the binary numbers 101 and 111 but output the result in decimal.

<verbatim>
obase=10
ibase=2
101+111
12
</verbatim>

Note : Keep in mind if you set the ibase to a particular number, all variable values you set will need to be in that base.

For example : Say we have ibase=2 and obase=10. To change ibase to 10 (decimal) then we would do : ''ibase=1010''

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Last edited on Wednesday, June 20, 2007 11:40:40 am by BenStaz

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