Creating 26 Alphabet Letter Buttons With The For Loop And String.fromcharcode()

here is some HTML Code as example:

Javascript

window.addEventListener( "load", function( windowLoadE ) {
    var p, letter, button, holder;
    holder = document.getElementById( "buttonsHolder" );
    for ( var i = 65; i <= 90; i++ ) {
        if ( i == 65 || i == 75 || i == 84 ) {
            p = document.createElement( "p" );
        }
        letter = String.fromCharCode( i );
        button = document.createElement( "button" );
        button.innerHTML = letter;
        button.setAttribute( "data-letter", letter );
        button.onclick = function( e ) { setLetter( this.getAttribute( "data-letter" ) ); };
        p.appendChild( button );
        if ( i == 74 || i == 83 || i == 90 ) {
            holder.appendChild( p );
        }
    }
} );
functionsetLetter( letter ) {
    var div = document.getElementById( "name" );
    div.innerHTML = div.innerHTML + letter;
}

This solution like @Arvind's, but I think better use attribute of html tag and set onclick with functions.

window.addEventListener( "load", function( windowLoadE ) {
    var p, letter, button, holder;
    holder = document.getElementById( "buttonsHolder" );
    for ( var i = 65; i <= 90; i++ ) {
        if ( i == 65 || i == 75 || i == 84 ) {
            p = document.createElement( "p" );
        }
        letter = String.fromCharCode( i );
        button = document.createElement( "button" );
        button.innerHTML = letter;
        button.setAttribute( "data-letter", letter );
        button.onclick = function( e ) { setLetter( this.getAttribute( "data-letter" ) ); };
        p.appendChild( button );
        if ( i == 74 || i == 83 || i == 90 ) {
            holder.appendChild( p );
        }
    }
} );
functionsetLetter( letter ) {
    var div = document.getElementById( "name" );
    div.innerHTML = div.innerHTML + letter;
}

<divid="buttonsHolder"></div><divid="name"></div>