I wanted two print to variables in one line. I am using a shell script #!/bin/sh loop and what I wanted to do is a for repeat which prints out something like:
variable1_case1 variable2_case2 and I have already tried
variable$i_case$i. 3 Answers
for i in 1 2; do echo variable${i}_case$i done should do what you want. Substitute 1 2 with the numbers or strings you need. Dependent on the values of $i you may need to quote it like so: echo variable"$i"_case"$i".
I assume the problem in your script is that you try to embed the variable names directly inside a text string, so that they are followed by other characters which could be part of a variable name. These do not only include alphanumeric characters but also the underscore.
So if you want to embed variables into a string in a way so that they are not separated from the rest by spaces or any non-variable-name characters, you can use the variable name notation with curly braces instead:
$ i=42 $ echo "variable${i}_case${i}." variable42_case42. Maybe I have gotten the wrong end of the stick, but do you want something like this:
#!/bin/sh while read a b; do echo variable:${a}_case:${b} done which will create this output:
/tmp/test.sh < /tmp/dat1 variable:1_case:2 variable:3_case:4 and the data file dat1 containing:
1 2 3 4 
