Importance of IF/ELSE Statements!

Why do we use if/else statements?
We use if/else statements in programming to execute different blocks of code based on certain conditions. This allows us to create programs that can make decisions and react to different inputs or situations.

What is the basic syntax of if/else if statements?
The basic syntax of if/else if statements is as follows:

if (condition1) {
// code block to execute if condition1 is true
} else if (condition2) {
// code block to execute if condition1 is false and condition2 is true
} else {
// code block to execute if all previous conditions are false
}
In this syntax, the if keyword is followed by a condition in parentheses. If this condition is true, the code block inside the curly braces will be executed. If the condition is false, the program will move on to the next condition in the else if statement. If all previous conditions are false, the program will execute the code block inside the else statement.

What is the purpose of isNaN?
isNaN is a function in JavaScript that stands for “is Not a Number”. It is used to determine whether a value is not a number. This can be useful in situations where you want to check whether a user input is a valid number, for example.

How do we evaluate conditions if we have &&? What about ||?
In JavaScript, && is the logical AND operator and || is the logical OR operator. When we evaluate conditions with &&, both conditions must be true for the overall condition to be true. When we evaluate conditions with ||, either one or both of the conditions must be true for the overall condition to be true.