Javascript Practice 14: JS Hero - What is x?

 

Question: 

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

function hi(name) {

  return 'Hi ' + name + '!';

}

let h1 = hi('Selva');

let h2 = hi('Pola');

let x = h1 + ' ' + h2;

Answer: 

'Hi Selva! Hi Pola!'

> This is a function declaration & not a function expression 

> name of the function: hi 

> parameter: () parameter is name

> statement: return 'Hi ' + name + '!'; enclosed in curly brackets

> the function must have a return statement that specifies the value to return

> the value type in this case is a string

> strings can be used with single or double quotes

> we can concatenate the string with a '+' sign

> declared a variable h1 and initialized it with a value

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

> in this case the argument 'hi (name)' is 'hi ('Selva!')'

> the value will be 'Hi Selva!'

> declared another variable h2 and initialized it with a value

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

> in this case the argument 'hi (name)' is 'hi ('Pola!')'

> the value will be 'Hi Pola!'

> declared another variable x and initialized it with a value

> this variable x concatenates the variables h1 & h2 with a space

> space is denoted by placing empty quotes between the '+' signs