Looping-based placement questions

1) 1 1 1 1 1 using for loop in Javascript

<script>
    for(i=0;i<=4;i++){
        console.log(1);

    }
</script>

2) 1 2 3 4 5

<script>
    for(i=1;i<6;i++){
        console.log(i);

    }
</script>

3) 1 3 5 7 9

<script>
    for(i=1;i<=10;i+2){
        console.log(i);

    }
</script>

4) 3 6 9 12 15

<script>
    for(i=3;i<=20;i+3){
        console.log(i);

    }
</script>

5) Multiples of 3 and 5

<script>
    for(i=0;i<=50;i++){
    if(i%3===0 && i%5===0){
    console.log(i);
}

    }
</script>