How do you do a floating point arithmetic in shell script?

How do you do a floating point arithmetic in shell script?

In Bash shell, we can only perform integer arithmetic. If we want to perform arithmetic involving a floating point or fractional values, then we will need to use various other utilities, such as awk , bc , and similar. For using the bc utility, we need to configure a scale parameter.

How does Shell compare to float value?

For simple calculations on floating point numbers (+-*/ and comparisons), you can use awk. Or, if you have ksh93 or zsh (not bash), you can use your shell’s built-in arithmetic, which supports floating point numbers. For more advanced floating point calculations, look up bc.

How do you make a floating point in bash?

Using the printf builtin command Since you can’t do floating-point in bash, you would just apply a given multiplier by a power of 10 to your math operation inside an Arithmetic Expansion, then use printf to display the float. For example, the operation 2/3 in Artithmetic Expansion as $((2/3)) would return 0 .

What is let in bash?

let is a bash and ksh keyword which allows for variable creation with simple arithmetic evaluation. If you try to assign a string there like let a=”hello world” you’ll get a syntax error. Works in bash and ksh93 . $(…) is command substitution, where you literally take the output of a command and assign to a variable.

Is let a bash command?

Bash let builtin command

• On Unix-like operating systems, let is a builtin command of the Bash shell that evaluates arithmetic expressions.
• Using let is similar to enclosing an arithmetic expression in double parentheses, for instance: (( expr ))

What is the use of LET command give an example?

The let command is used to evaluate arithmetic expressions on shell variables. Options: Basic arithmetic operators : The addition(+), subtraction(-), multiplication(*), division(/) and modulus(%) operators can be used in the expression with the let command.