how insert decimal number in ubuntu?

Amany ahmad

10/24/23, 10:49 AM

How can I multiply by decimal numbers and get the result in decimal?? How can the code be modified to meet these two conditions?

104

1 + 3

server

command-line

bash

Jos

10/24/23, 11:09 AM

Please read `man bc`.

Dan

10/24/23, 11:28 AM

Please, don't use screenshots of code. Instead, paste your code into your question and format it as code by selecting it and clicking the `{}` icon (or the Ctrl+K shortcut).

steeldriver

10/24/23, 11:55 AM

Related: [Bash only gives integer as output regardless of input when performing calculations](https://askubuntu.com/questions/1108328/bash-only-gives-integer-as-output-regardless-of-input-when-performing-calculatio)

Score:0

Ubuntu

Ray Butterworth

10/25/23, 3:01 AM

You could call the desk-calculator program to do the arithmetic:

v1 = 3
pi = 3.14
$ echo "Area of Circle =" $(dc --expression="$pi $v1 * $v1 * p")
Area of Circle = 28.26

In case you aren't familiar with it, dc uses reverse-polish syntax:

stack $pi
stack $v1
replace the top two numbers with their product
stack $v1
replace the top two numbers with their product
print the top of the stack

These are equivalent expressions:

$ echo "Area of Circle =" $(dc --expression="$pi $v1 * $v1 * p")
Area of Circle = 28.26

$ echo "Area of Circle =" $(dc --expression="$pi $v1 2 ^ * p")
Area of Circle = 28.26

$ echo "Area of Circle =" $(dc --expression="$v1 2 ^ $pi * p")
Area of Circle = 28.26

+ 2

Amany ahmad

11/2/23, 6:04 AM

when use this command>>> linux write: dc stack empty & pi: not found command

Ray Butterworth

11/2/23, 1:09 PM

@Amanyahmad, did you first set the values of *pi* and *v1*? Before doing the `echo …` line, try `echo $pi` and `echo $v1` to verify that they are set correctly. ¶ Also, make sure you are using the bash shell: `echo $SHELL` should print "/bin/bash".

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