Linux CLI 69 🐧 bc in shell scripts

a - bc introduction in shell scripts
bc reads input from standard input (stdin) and outputs results to standard output (stdout).
You can use it within a shell script by piping expressions to it or by using here documents
While basic arithmetic can be done using $((...)) or expr, it is limited to integer operations ...
and does not support decimal precision or advanced mathematical functions like square roots.
bc is more versatile in such cases.
In summary, bc is a powerful tool for advanced mathematical operations in shell scripts, especially for:
Floating-point calculations
  Complex expressions (e.g., square root, exponentials)
Precise decimal arithmetic using scale
  
b - bc examples in shell scripts
example 1 → Simple Arithmetic
example 2 → Using Variables
example 3 → Division with Two Decimal Places
example 4 → Square Root
example 5 → Exponential
example 6 → Using Here Documents

c - bc tips in shell scripts
Quoting expressions → Always use quotes when passing variable expressions to bc to prevent unexpected behavior.
Setting scale → For precise decimal output, always set scale explicitly.
Error handling → Use if statements to check for errors in bc output or return codes.
Example → Error Handling
By integrating bc into your scripts, you can handle a wide range of numerical problems...
that go beyond the standard shell arithmetic capabilities.

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