Calculator-using-JavaScript/calculator.js at master · pk2k14/Calculator-using-JavaScript · GitHub

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function one()
		{
			var x = document.getElementById("screen").value;
    			document.getElementById("screen").value = x+"1";
		}
		function two()
		{
			var x = document.getElementById("screen").value;
    			document.getElementById("screen").value = x+"2";
		}
		function three()
		{
			var x = document.getElementById("screen").value;
    			document.getElementById("screen").value = x+"3";
		}
		function minus()
		{
			var x = document.getElementById("screen").value;
    			document.getElementById("screen").value = x+"-";
		}

		function four()
		{
			var x = document.getElementById("screen").value;
    			document.getElementById("screen").value = x+"4";
		}
		function five()
		{
			var x = document.getElementById("screen").value;
    			document.getElementById("screen").value = x+"5";
		}
		function six()
		{
			var x = document.getElementById("screen").value;
    			document.getElementById("screen").value = x+"6";
		}
		function plus()
		{
			var x = document.getElementById("screen").value;
    			document.getElementById("screen").value = x+"+";
		}

		function seven()
		{
			var x = document.getElementById("screen").value;
    			document.getElementById("screen").value = x+"7";
		}
		function eight()
		{
			var x = document.getElementById("screen").value;
    			document.getElementById("screen").value = x+"8";
		}
		function nine()
		{
			var x = document.getElementById("screen").value;
    			document.getElementById("screen").value = x+"9";
		}

		function zero()
		{
			var x = document.getElementById("screen").value;
    			document.getElementById("screen").value = x+"0";
		}
		function equal()
		{
			var x = document.getElementById("screen").value;
    			document.getElementById("screen").value = eval(x);
		}
		function multiply()
		{
			var x = document.getElementById("screen").value;
    			document.getElementById("screen").value = x+"*";
		}
		function divide()
		{
			var x = document.getElementById("screen").value;
    			document.getElementById("screen").value = x+"/";
		}