bc

An arbitrary precision calculator language. See also: dc. More information: https://manned.org/man/freebsd-13.0/bc.1.

• Start an interactive session:
  bc
• Start an interactive session with the standard math library enabled:
  bc --mathlib
• Calculate an expression:
  bc --expression='{{5 / 3}}'
• Execute a script:
  bc {{path/to/script.bc}}
• Calculate an expression with the specified scale:
  bc --expression='scale = {{10}}; {{5 / 3}}'
• Calculate a sine/cosine/arctangent/natural logarithm/exponential function using mathlib:
  bc --mathlib --expression='{{s|c|a|l|e}}({{1}})'