function.html

<script>
    //simple function
    function SimpleFunction() {
        console.log("Simple function Calling");
    }
    SimpleFunction()

    //passing variable in function
    function passvariable(a,b){
        console.log(a-b)
    }
    passvariable(7,5);

//global keyword a in this function we don't want to write var,let,const keyword in this
    function fun1()
    {
      a = 10;
    }
    fun1()
    console.log(a);

    //return number
    function fun2(num)
    {
        return num-2;
    }
    console.log(fun2(10))


    //single line
    function nextLine(arr,item){
        arr.push(item)
        return arr.shift();
    }
    var testArr=[1,2,3,4,5]
    console.log("Before : "+JSON.stringify(testArr));
    console.log(nextLine(testArr,6))
    console.log("After : "+JSON.stringify(testArr));
</script>