require "erb"


a = 1
b = 2

template = "

<h1>a = <%= a %></h1>
<h1>b = <%= b %></h1>

"

puts ERB.new(template, nil, "%-<>").result(binding)

# output:
#
#
# <h1>a = 1</h1>
# <h1>b = 2</h1>
#
#