Defining and calling variables in shell script

Question

I want to define variable in shell script as:

value1 = 40  (this can be number or character)

and want to use as in a text like:

$value1_position.xyz (I basically want 40_position.xyz)

How do I do this?

DRC · Accepted Answer · 2014-11-29 12:46:20Z

1

this should do:

${value1}_position.xyz

beware that the variable should be declared with this syntax

value1=40

notice the absence of spaces around the =

answered Nov 29, 2014 at 12:46

DRC

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1 Comment

Thank you @DRC. I was giving spaces .. Appreciated.

foips · Accepted Answer · 2014-11-29 12:49:55Z

1

To define a variable, simply make sure there are no spaces between the variable name and value

value1=40

To use that variable in bash substitution, creating what you want, use the $ replacement symbol like so:

${value1}_position.xyz

To append that to your text file

echo "${value1}_position.xyz" >> file.txt

answered Nov 29, 2014 at 12:49

foips

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Thank you @foips. I was giving spaces. Appreciate your quick answer.