How do I use shell variables in scripts?

How do I use shell variables in scripts?

You can use shell variables in scripts by declaring them with the syntax variable_name=value. For example, name=John.

How do I access the value of a variable?

To access the value of a variable, use the $ symbol before the variable name. For example, echo $name will output 'John'.

Can I use variables in command substitutions?

Yes, you can use variables in command substitutions. For example, result=$(command $variable) will execute the command with the variable's value.

What about using variables in loops?

You can use variables in loops by referencing them inside the loop. For example, for i in {1..5}; do echo $i; done will print numbers 1 to 5.