checkbox default checked in html code example

Example 1: how to set checkbox checked

<input type="checkbox" name="vehicle3" value="Boat" checked>

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Example 2: html checkbox default checked

<!-- Add checked tag  -->
<input type="checkbox" name="vehicle3" value="Boat" checked>

Example 3: how to make checkbox checked in html

<input type="checkbox" checked={props.completed} /> 

#for props completed is true/false , hence if completed is false then checkbox will not be clicked .
# if the checkbox is true it will be will be checked