Javascript additions

December 29, 2021

I have a JS code whitch I wrote to add the values of variables together, but it just writes the values next to each other, it does not add them together. How to I add these values together?

JS:

function display(){
    let dollarvalue = `$ ${motorverseny}+${motorprofi}+${motoralap}+${turboverseny}+${turboprofi}+${turboalap}+${ecuverseny}+${ecuprofi}+${ecualap}+${valtoverseny}+${valtoprofi}+${valtoalap}+${felfuggesztesverseny}+${felfuggesztesprofi}+${felfuggesztesalap}`;
    let ppvalue = `${motorvenom}+${turbovenom}+${ecuvenom}+${valtovenom}+${felfuggesztesvenom}`;
    document.getElementById("pptext").innerHTML = `${ppvalue}`;
    document.getElementById("dollartext").innerHTML = `${dollarvalue}`;
}

HTML:

<h3 class="dollar">Dollar:</h3>
<h5 id="dollartext" style="color: #7cc576;"></h5>
<h3 class="pp">PP:</h3>
<h5 id="pptext" style="color: blue;"></h5>

>Solution :

This is because you’re not actually summing the values, but you are using string interpolation incorrectly. You need to place the variables within the curly braces and sum them. Here is an example:

let var1 = 10;
let var2 = 20;
let dollarValueWrong = `$ ${var1}+${var2}`; // results in the string `$ 10+20`
let dollarValueCorrect = `$ ${var1+var2}`; // results in the string `$ 30`