> ## Documentation Index
> Fetch the complete documentation index at: https://blog.sumathi.dev/llms.txt
> Use this file to discover all available pages before exploring further.

#  Functions

* To do repetitive actions
* To make a change it can occur at a single place
* A block of code designed to perform a particular task
* ```js theme={null}
    function name (paramenter_1 , parameter_2) {
    // parameters work as local variables 
    // name can be any thing 
    }
  ```
* ```js theme={null}
    let a = 1;
    let b = 2;
    let c = 3;

    console.log("One plus Average of a and b is ", 1 + (a+b)/2);
    console.log("One plus Average of b and c is ", 1 + (b+c)/2);
    console.log("One plus average of a and c is ", 1 + (a+c)/2);

    function onePlusAvg (x,y) {
        return 1 + (x+y)/2

    }
    console.log("One plus Average of a and b is ", onePlusAvg(a,b));
    console.log("One plus Average of b and c is ", onePlusAvg(b,c));
    console.log("One plus average of a and c is ", onePlusAvg(a,c));

    // Arrow function with args
    const sum = (p,q) => {
        return p + q;
    }
    console.log(sum(1,2))

    // function without input args
    const hello = () => {
        console.log("hello");
    }
    hello()
  ```