if-else in JavaScript
``` var i = 20; if (i == 10) document.write("i is 10"); else if (i == 15) document.write("i is 15"); else if (i == 20) document.write("i is 20"); else document.write("i is not present"); ```
``` var i = 20; if (i == 10) document.write("i is 10"); else if (i == 15) document.write("i is 15"); else if (i == 20) document.write("i is 20"); else document.write("i is not present"); ```