[Solved] Unexpected token error in JS function

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You shouldn’t terminate the first line with a ;

var goSleep=function();// goSleep Function
// -------------------^ Remove this!!!
{
    var count=0;
    var loop=false;
    while(count<3) //while loop
    {
        console.log("hi!");
        count++;
        loop=false;
    }
    for(i=0;i<4;i++) //for loop
    {
        console.log(i);
    }
    var login=false;
    do{//do while loop
        console.log("gud day");
    }while(login);
};
goSleep();

Change your code to:

var goSleep=function() // goSleep Function
{
    var count=0;
    var loop=false;
    while(count<3) //while loop
    {
        console.log("hi!");
        count++;
        loop=false;
    }
    for(i=0;i<4;i++) //for loop
    {
        console.log(i);
    }
    var login=false;
    do{//do while loop
        console.log("gud day");
    }while(login);
};
goSleep();

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solved Unexpected token error in JS function