Question

1

Extract particular value from the variable

rated 0 times [ 1] [ 0] / answers: 1 / hits: 681 / 1 Year ago, sun, january 8, 2023, 1:19:39

I want just know how to extract the value from the variable in shell script.
following is the code:

var=Volume: 0: 100% 1: 100%

or

var=Volume: 0: 35% 1: 35%

I want to extract 100 or 35 depends value from the variable and store it into another variable.
so how can i do this?

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2 Years ago

answered 1 Year ago socelebrate · Accepted Answer

I think this is what the command you looking for,

sed 's/.* (.*)%.*/1/g'

Example:

$ echo 'var=Volume: 0: 35% 1: 35%' | sed 's/.* (.*)%.*/1/g'

35



$ echo 'Volume: 0: 35% 1: 35%' | sed 's/.* (.*)%.*/1/g'

35



$ var="Volume: 0: 35% 1: 35%"

$ echo $var | sed 's/.* (.*)%.*/1/g'

35

This command will display the first number 35 or 100 before the first % mark.