how to know when to use an if statement in javascript code example

Example 1: javascript how to do else if

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

Example 2: how to use if else statement in javascript

var condition = true; // An example condition for true/false conditions

if (condition == true) {
	console.log('condition is true');  
} else {
	console.log('condition is not true');  
} // Console will output 'condition is true'