how to use if else in html code example

Example 1: html if else statement example

    
show is false


  
show is ture

Example 2: javascript if else

var age=20;
if (age < 18) {
	console.log("underage");
} else {
	console.log("let em in!");
}

Example 3: else if javascript

if (condition1) {
  // code to be executed if condition1 is true
} else if (condition2) {
  // code to be executed if the condition1 is false and condition2 is true
} else {
  // code to be executed if the condition1 is false and condition2 is false
}