def broken_print_variable(var_name)
  eval %{puts "The value of #{var_name} is " + #{var_name}.to_s}
end
tin_snips = 5
broken_print_variable('tin_snips')

NameError: undefined local variable or method `tin_snips' for main:Object
...

NameError: undefined local variable or method `tin_snips' for main:Object
	from (irb):2:in `broken_print_variable'
	from (irb):5:in `eval'
	from (irb):2:in `broken_print_variable'
	from (irb):5

var_name = 'tin_snips'
eval %{puts "The value of #{var_name} is " + #{var_name}.to_s}

The value of tin_snips is 5

The value of tin_snips is 5

def print_variable(var_name, binding)
  eval %{puts "The value of #{var_name} is " + #{var_name}.to_s}, binding
end
vice_grips = 10
print_variable('vice_grips', binding)

The value of vice_grips is 10

The value of vice_grips is 10