The HTML <kbd> element represents user input, like keyboard input or voice commands.
Text surrounded by <kbd> tags is typically displayed in the browser's default monospace font.
The kbd element represents user input:
Save the document by pressing Ctrl + S
The HTML <samp> element represents output from a program or computing system.
Text surrounded by <samp> tags is typically displayed in the browser's default monospace font.
The samp element represents output from a program or computing system:
If you input wrong value, the program will return Error!
The HTML <code> element defines a fragment of computer code.
Text surrounded by <code> tags is typically displayed in the browser's default monospace font.
Programming code example:
				x = 5;
				y = 6;
				z = x + y;
				
			Notice that the <code> element does not preserve extra whitespace and line-breaks.
To fix this, you can put the <code> element inside a <pre> element.
To fix this, you can put the code element inside a pre element:
		
		x = 5;
		y = 6;
		z = x + y;
		
			The HTML <var> element defines a variable.
The variable could be a variable in a mathematical expression or a variable in programming context.
Einstein wrote: E = mc2.