Floating Point calculator in Linux Shell learning-Bash

Linux bash calculator is easy to use, at least it is easier to be lazy.

How:

1. Use the command line
# Scale indicates the exact number of digits of a floating point.
[Root @ hostname ~] # BC
BC 1.06
Copyright 1991-1994,199 7, 1998,200 0 Free Software Foundation, Inc.
This is free software with absolutely no warranty.
For details type 'warranty '.
3 + 4
7
Scale = 2; 3/4
. 75

CTRL + d

2. Unified Computing Through computing documents
[Root @ hostname ~] # Vi Calc. BC
[Root @ hostname ~] # Cat Calc. BC
3 + 4
Scale = 2; 3/4
[Root @ hostname ~] # BC Calc. BC
BC 1.06
Copyright 1991-1994,199 7, 1998,200 0 Free Software Foundation, Inc.
This is free software with absolutely no warranty.
For details type 'warranty '.
7
. 75

CTRL + d

3. Digital Conversion
# IBASE refers to the input number system and obase refers to the output number system.
[Root @ hostname ~] # Echo 'ibase = 10; obase = 2; 11' | BC

1011

Reference:

Http://www.linuxidc.com/Linux/2012-01/52386p2.htm

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