how insert decimal number in ubuntu?

Question

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

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). — Dan, Oct 24 '22 at 11:28
Related: Bash only gives integer as output regardless of input when performing calculations — steeldriver, Oct 24 '22 at 11:55

score 0 · Answer 1 · answered Oct 25 '22 at 03:01

0

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

answered Oct 25 '22 at 03:01

Ray Butterworth

1,393

when use this command>>> linux write: dc stack empty & pi: not found command – Amany ahmad Nov 02 '22 at 06:04
@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". – Ray Butterworth Nov 02 '22 at 13:09

how insert decimal number in ubuntu?

1 Answers1