What is the Result of this statement.

You are missing {} braces in if condition.

It will log as "Not Same"

let a = 10;
let b = 10;
let c = 10;

if (a === b && b === c) {
    console.log("Same");
} else {
    console.log("Not Same");
}

The correct form of usage. will give correct output.

As above code answer is "Not same".

In the given code, the comparison a==b==c might not work as expected. JavaScript does not support chaining comparison operators like this. 

let a = 10;
let b = 10;
let c = 10;

if (a === b && b === c) {
    console.log("Same");
} else {
    console.log("Not Same");
}


//Output
Same