Check Box YII2

How to Make Checkbox selected in Default.? what is the syntax for this.

THis is my code

<?= $form->field($model, 'attendence')->checkbox(['checked'=>true])->label(false) ?>

help me out

and then it is not checked inside the loop.

Set the default value to the model.

$model->attendence = true;

What do you mean by that?

Setting the attribute to true should automatically check the checkbox.