Calling a function when using string interpolation

Question

Lets say I have a Javascript function that adds two numbers as follows

function addNumbers(a, b){
return a+b;
}

Then I want to output to the console the result of calling the function with two numbers. When using string concatenation I can do the following:

console.log('The sum of two numbers is' +
addNumbers(a, b));

However, my question is how do I call the function if I want to use string interpolation? Something like:

 console.log(`the sum of two numbers 
    is addNumbers(a, b)`);

score 3 · Answer 1 · answered Mar 06 '19 at 16:00

3

As always, the expression you want to output the result of evaluating goes between ${ and }.

function addNumbers(a, b) {
  return a + b;
}

const a = 4;
const b = 6;

console.log(`the sum of two numbers 
    is ${addNumbers(a, b)}`);

answered Mar 06 '19 at 16:00

Quentin

914,110
126
1,211
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Thanks for that explanation now I get it. – Ben Mar 06 '19 at 16:14

score 1 · Answer 2 · answered Mar 06 '19 at 16:00

All you have to is wrap the expression with ${}

console.log(`the sum of two numbers is ${addNumbers(a, b)}`);

Template literals are enclosed by the back-tick (``) (grave accent) character instead of double or single quotes. Template literals can contain placeholders. These are indicated by the dollar sign and curly braces (${expression})

score 0 · Answer 3 · answered Mar 06 '19 at 16:02

0

You can execute any expression inside of template literals (``) with a inside a $ and curly braces (${}).

Your example would look like this:

 console.log(`the sum of two numbers is ${addNumbers(a, b)}`);

See mdn docs for more information.

answered Mar 06 '19 at 16:02

youngwerth

602
5
11

Calling a function when using string interpolation

3 Answers3