What Is eval()?
eval() is a built-in function found in many programming languages that takes a string and executes it as code at runtime. Instead of writing instructions directly in a source file, a program passes a string such as "2 + 3 * 4" to eval(), and the language's interpreter parses, compiles and runs it on the spot, returning the result. The concept appears in JavaScript, Python, PHP, Ruby, Lua
