Javascript Practice 18: JS Hero - Silent Teacher

 

Question: 

 

Which value does x have after execution of the following code? 

 

function double(name) {

  return name + ' and ' + name;

}

let x = double('Roy'); 

Answer: 

 

'Roy and Roy'

> function name is double

> it is a function expression

> parameter is name

> statement is return name + ' and ' + name; enclosed in curly brackets

> this function returns a statement that has concatenated two parameters with 'and using '+'  sign

> declared a variable x and initialized it with a value 

> the value will be, the output we get when we 'call' the function double with the argument