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HTML with CANVAS to draw square.

<html>

<head>

    <head>
        <title>
            html with canvas tag. It is used to draw graphics on HTML page. With this canvas tag, we use javascript to draw it.
        </title>
    </head>

    <body>
        <canvas id="square" width="200" height="200" style="border:7px dotted #000089;">
            <!--we always use canvas id for script-->
            <!--since we are going to draw square, we use attribute width and height with style/css-->
            <!-- here the width and height defines canvas size-->
            <!--since it has no border so-->
            <!--we can use different color with the help of css-->
        </canvas>


    </body>


</html>
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HTML with canvas to draw straight line.

<html>

<head>

    <head>
        <title>
            html with canvas tag. It is used to draw graphics on HTML page. With this canvas tag, we use javascript to draw it.
        </title>
    </head>

    <body>
        <canvas id="straightline" width="200" height="200" style="border:7px dotted #000089;">
            <!--we always use canvas id for script-->
            <!--since we are going to draw square, we use attribute width and height with style/css-->
            <!-- here the width and height defines canvas size-->
            <!--since it has no border so-->
            <!--we can use different color with the help of css-->

        </canvas>
        <script>
            var ele = document.getElementById("straightline"); //this code finds the canvas Element using getElementbyID
            var object = ele.getContext("2d"); //it creates an object for given canvas using getcontext. Then stores in variable
            object.moveTo(0, 0); //it is the starting point of line.
            object.lineTo(200, 200); //it is the ending part of line
            object.stroke(); //it draws or connects both the co-ordinates
        </script>
    </body>


</html>
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HTML with canvas to draw circle.

<html>

<head>

    <head>
        <title>
            html with canvas tag. It is used to draw graphics on HTML page. With this canvas tag, we use javascript to draw it.
        </title>
    </head>

    <body>
        <canvas id="straightline" width="500" height="500" style="border:7px dotted #000089;">
            <!--we always use canvas id for script-->
            <!--since we are going to draw circle, we use attribute width and height with style/css-->
            <!-- here the width and height defines canvas size-->
            <!--since it has no border so-->
            <!--we can use different color with the help of css-->

        </canvas>
        <script>
            var ele = document.getElementById("straightline"); //this code finds the canvas Element using getElementbyID
            var object = ele.getContext("2d"); //it creates an object for given canvas using getcontext. Then stores in variable
            object.beginPath(); //it begins the path
            object.arc(100, 100, 100, 0,  2*Math.PI); //it creates the arc/curve with
            //first value is x-co-ordinate
            //second value is y-co-ordinate
            //third value is radius
            //forth value is starting angle 
            //last value is for one complete rotation/360
            object.stroke(); //it draws the circle
        </script>
    </body>


</html>
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HTML with canvas to draw arc.

<html>

<head>

    <head>
        <title>
            html with canvas tag. It is used to draw graphics on HTML page. With this canvas tag, we use javascript to draw it.
        </title>
    </head>

    <body>
        <canvas id="straightline" width="500" height="500" style="border:7px dotted #000089;">
            <!--we always use canvas id for script-->
            <!--since we are going to draw arc, we use attribute width and height with style/css-->
            <!-- here the width and height defines canvas size-->
            <!--since it has no border so-->
            <!--we can use different color with the help of css-->

        </canvas>
        <script>
            var ele = document.getElementById("straightline"); //this code finds the canvas Element using getElementbyID
            var object = ele.getContext("2d"); //it creates an object for given canvas using getcontext. Then stores in variable
            object.beginPath(); //it begins the path
            object.arc(100, 100, 100, 0, Math.PI); //it creates the arc/curve (half circle). We can also use Math.PI/2
            //first value is x-co-ordinate
            //second value is y-co-ordinate
            //third value is radius
            //forth value is starting angle 
            //last value is for one complete rotation/360
            object.stroke(); //it draws the circle
        </script>
    </body>


</html>
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HTML with canvas to write text on canvas.

<html>

<head>

    <head>
        <title>
            html with canvas tag. It is used to draw graphics on HTML page. With this canvas tag, we use javascript to draw it.
        </title>
    </head>

    <body>
        <canvas id="straightline" width="500" height="500" style="border:7px dotted #000089;">
            <!--we always use canvas id for script-->
            <!--since we are going to draw arc, we use attribute width and height with style/css-->
            <!-- here the width and height defines canvas size-->
            <!--since it has no border so-->
            <!--we can use different color with the help of css-->

        </canvas>
        <script>
            var ele = document.getElementById("straightline"); //this code finds the canvas Element using getElementbyID
            var object = ele.getContext("2d"); //it creates an object for given canvas using getcontext. Then stores in variable
            object.font = "40px Arial"; //changes the size of text to 40.

            object.fillText("Hello javascript", 40, 50) //40 is x co-ordinate,50 is y co-ordinate
        </script>
    </body>


</html>
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HTML with canvas to write text on canvas. with background color

<html>

<head>

    <head>
        <title>
            html with canvas tag. It is used to draw graphics on HTML page. With this canvas tag, we use javascript to draw it.
        </title>
    </head>

    <body>
        <canvas id="straightline" width="500" height="500" style="border:7px dotted #000089;">
            <!--we always use canvas id for script-->
            <!--since we are going to draw arc, we use attribute width and height with style/css-->
            <!-- here the width and height defines canvas size-->
            <!--since it has no border so-->
            <!--we can use different color with the help of css-->

        </canvas>
        <script>
            var ele = document.getElementById("straightline"); //this code finds the canvas Element using getElementbyID
            var object = ele.getContext("2d"); //it creates an object for given canvas using getcontext. Then stores in variable
            object.font = "40px Arial"; //changes the size of text to 40.
            object.fillStyle = "green";
            object.fillText("Hello javascript", 40, 50) //40 is x co-ordinate,50 is y co-ordinate
        </script>
    </body>


</html>
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HTML with canvas to fill entire canvas with color

<html>

<head>

    <head>
        <title>
            html with canvas tag. It is used to draw graphics on HTML page. With this canvas tag, we use javascript to draw it.
        </title>
    </head>

    <body>
        <canvas id="straightline" width="500" height="500" style="border:7px dotted #000089;">
            <!--we always use canvas id for script-->
            <!--since we are going to draw arc, we use attribute width and height with style/css-->
            <!-- here the width and height defines canvas size-->
            <!--since it has no border so-->
            <!--we can use different color with the help of css-->

        </canvas>
        <script>
            var ele = document.getElementById("straightline"); //this code finds the canvas Element using getElementbyID
            var object = ele.getContext("2d"); //it creates an object for given canvas using getcontext. Then stores in variable
            object.fillStyle = "green"; //changes the color of canvas
            //Either we can use
            //object.fillRect(0, 0, 500, 500);//it fills the entire canvas with green color
            //or
            object.fillRect(0, 0, straightline.width, straightline.height); //it fills the entire canvas with green color
        </script>
    </body>


</html>
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