Function of 吧 in 循环吧代码 In this page for learning loops in JavaScript by Mozilla Developer Network the title "Looping code" is translated as 循环吧代码. What is the meaning/function of 吧 here?
This is an exclamatory sentence. (It lakes exclamation mark 循环吧！代码 )

It means "代码，循环吧！"

It seems like that:

滚蛋吧！肿瘤君

翻滚吧！阿信