JAVASCRIPT

concatenate 2 numbers js

Use "" + 5 + 6 to force it to strings. 
This works with numerical variables too:

var a = 5;
var b = 6;
console.log("" + a + b);

Simple code example of adding two numbers in javascript

<script>
function addNumbers(a, b) {  
    return a + b;  
}  
var sum = addNumbers(15, 25);  
document.write('Sum of the numbers is: ' + sum); 
</script>

add two numbers in javascript

const addTwoNumbers = (a,b)=>{
return a+b
}

console.log(addTwoNumbers(6,5))

javascript Function Add Two Numbers

// program to add two numbers using a function
// declaring a function
function add(a, b) {
    console.log(a + b);
}

// calling functions
add(3,4);
add(2,9);

javascript function add two numbers

//Simple Function to add two numbers
const addTwoNums = (num1, num2) => {
    let sum = num1 + num2;
    return sum
}
console.log(addTwoNums(60, 9)) //function call and log the answer to the console