bc is an arbitrary precision calculator language

By default the bc command installed in your system, if the bc command not found  we can easily install it.

#  bc

-bash: bc: command not found

Ubuntu / Debian

Use the below command to install bc  in Ubuntu or Debian
 
# apt-get install bc

CentOS / RHEL / Fedora
 
#  yum install bc

---> Package bc.x86_64 0:1.06.95-1.el6 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

=====================================================================================
 Package                 Arch            Version              Repository       Size
=====================================================================================
Installing:
 bc                      x86_64          1.06.95-1.el6         base            110 k
Transaction Summary
======================================================================================
Install       1 Package(s)

Total download size: 110 k
Installed size: 212 k
Is this ok [y/N]: y
....
  Installing : bc-1.06.95-1.el6.x86_64                                          1/1
  Verifying  : bc-1.06.95-1.el6.x86_64                                           1/1
Installed:
  bc.x86_64 0:1.06.95-1.el6                                                                                                                          
Complete!

Once you have installed it you can use the below commands,
 
#  bc --version

bc 1.06.95

#  man bc

Use bc command with simple calculation:
 
#  bc

bc 1.06.95
Copyright 1991-1994, 1997, 1998, 2000, 2004, 2006 Free Software Foundation, Inc.
This is free software with ABSOLUTELY NO WARRANTY.
For details type `warranty'.
125*12/100
15
125+15
140

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