## Calculator commands in linux

###### Name bc An arbitrary precision calculator language 2. Synopsis
`bc [ -hlwsqv ] [long-options] [  file ... ]`
##### 3. Examples

bc is a very handy calculator. No need for GUI when using bc. Let’s see if it knows how to count. We will start with addition:

`\$ echo "34.7 + 345.655" | bc`

`\$ echo "34.7 - 345.655" | bc`

Multiplication:

`\$ echo "34.7 * 345.655" | bc`

For division we need to specify a floating point as a “scale=x”, so for example to calculate with a floating point precision of 10, we should enter:

`\$ echo "scale=10; 10 / 3" | bc`

The default precision is 0:

`echo "10 / 3" | bc`

Converting from decimal to hexadecimal number is even easier. All we need to specify is an output base ( obase ) and an input base ( ibase ). Let’s convert a decimal 1000 number to a hexadecimal number:

`\$ echo "obase=16; ibase=10; 1000;" | bc`

Source taken from http://linuxconfig.org/