If/else statements are used to run code on dependent on a condition being true or false. The condition in an if/else statement is nested within the parentheses of the function. As the condition is passed, it will be decided whether it is true or false. If the condition is true, the code will execute one way, however, if the condition is false, the code will execute a different way. The if statement is used for a true condition, while else is used for the false condition. An example of an if/else statement could be written as
if (x == 5) {
alert(“This number is equal to 5”);
} else {
alert(“This number is not equal to 5”);
} .
With this example, the user would input a number to take the spot of x, if that number is 5 the condition will be true and the if statement will run. If it does not equal 5, the else statement will run. The use of isNaN is to identify whether or not the value used is an illegal number or not. If/else statements can be more complex by using && and II operators. The && operator means that the condition is true is when both the first and second expression of the statement are both true and the II operator is true when either the first or the second expression evaluate to true in the condition.
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Thank you for the post. From my experience, understanding if/else statements gets easier if we remember our earlier readings and exercises on swim lanes and systems. Just like swim lanes where we used if statement in diamond shapes to construct flow of process, if/else statements help us to construct JavaScript code.
Thank you Aidan, for the example you used to help us gain a better understanding on the if/while statements. It’s very helpful to see a visual instead of a definition. I appreciate it.
reetings Aiden,
I appreciate your post, and I would like to add my perspective on understanding if/else statements in JavaScript. In my experience, grasping the concept of if/else statements can be made simpler by recalling the fundamentals we learned from earlier readings and exercises on swim lanes and systems.
For example, when we were working with swim lanes, we used if statements in diamond shapes to depict the flow of the process. Similarly, if/else statements enable us to construct logical conditions in our JavaScript code. By using these statements, we can instruct the code to perform certain actions based on the conditions we set.
Moreover, mastering if/else statements is crucial in building more complex algorithms and applications. As we delve deeper into coding, we will realize that they are fundamental building blocks of decision-making processes. Therefore, I would recommend practicing and reviewing if/else statements regularly to become proficient in coding.
I hope this helps, let me know if you have any further questions or concerns.