MVC Validation Web Form

Question

i have dowonloaded html form template ,and now i am using it 

how can i add some validation to it like an specific text filed must be integer

,required field

example of my html form here

<form action="/" method="post">

<div class="top-row">

<div class="field-wrap">

<label>

First Name<span class="req">*</span>

</label>

<input type="text" required autocomplete="off" />

</div>

<div class="field-wrap">

<label>

Last Name<span class="req">*</span>

</label>

<input type="text" required autocomplete="off" />

</div>

</div>

<div class="field-wrap">

<label>

Email Address<span class="req">*</span>

</label>

<input type="email" required autocomplete="off" />

</div>

<div class="field-wrap">

<label>

Set A Password<span class="req">*</span>

</label>

<input type="password" required autocomplete="off" />

</div>

<button type="submit" class="button button-block" />Get Started</button>

</form>