set checkbox value to checked code example
Example 1: html checkbox
<form>
<input type="checkbox" id="periph1" name="peripherals" value="screen">
<label for="periph1"> I have a Screen</label>
<input type="checkbox" id="periph2" name="peripherals" value="keyboard">
<label for="periph2"> I have a Keyboard</label>
<input type="checkbox" id="periph3" name="peripherals" value="mouse">
<label for="periph3"> I have a Mouse</label>
<button type="submit">Send</button>
</form>
Example 2: checkbox set checked jquery
.prop('checked', true);