#!/bin/bash
list="one two three"
one=1
two=2
three=3
for k in $list
do
echo $k
done
For the code above, output is:
one
two
three
But I always think it should output:
1
2
3
It's confusing. How to understand this?
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1 Answer
The expansion $k just gives you the name of the variable as a string. If you want the value of the variable, you must use the parameter expansion syntax ${!k}. This is documented here.
#!/bin/bash
list="one two three"
one=1
two=2
three=3
for k in $list
do
echo "${!k}"
done
Output
1
2
3
