An IF statement is called a control structure because it controls what happens in a program based on certain conditions.

In JavaScript, control structures manage the flow of a program by determining which code blocks execute and how often. Beyond the if statement, key control structures include:
Conditional Statements: if...else: Executes code blocks based on whether a condition is true or false. else if: Checks additional conditions if previous ones are false.
switch: Selects code to execute from multiple options based on a variable's value
Loops:
for: Repeats code a specific number of times.
while: Continues executing code as long as a condition remains true.
do...while: Executes code once before checking the condition, then repeats if true.
for...in: Iterates over the enumerable properties of an object.
for...of: Iterates over iterable objects like arrays or strings.
Jump Statements:
break: Exits the current loop or switch statement.
continue: Skips the current iteration of a loop and proceeds to the next one.
return: Exits a function and optionally returns a value.
throw: Throws a user-defined exception.
Exception Handling:
try...catch...finally: Handles exceptions, allowing code to run safely by catching errors and executing cleanup code.

A boolean expression is a part of code that checks if something is true or false. It helps the program make decisions based on whether a condition is met.
Simple Examples:
Comparisons:

5 > 3 (Is 5 greater than 3?) — This is true.
10 == 10 (Is 10 equal to 10?) — This is true.

The equality operator in JavaScript is ==. It’s used to compare two values to see if they are equal.
If they are the same, it returns true; if they are different, it returns false.

Indenting your code in IF statements is important because:
Makes Code Easier to See: Indenting helps show what belongs to the IF statement and what doesn’t, so you can understand the code better.
Shows the Code Blocks Clearly: With indentation, you can see which lines are part of the IF statement. This is useful if you have IF statements inside other IF statements.
Helps Avoid Mistakes: Indented code makes it easier to spot errors, like a line that’s not in the right place.
Good Practice: Most programmers indent their code, so others will expect it. This makes it easier for others to read and work with your code.

A code block in JavaScript is a group of commands put inside curly braces { }. It makes JavaScript treat everything inside as one part. Code blocks are used in IF statements, loops, and functions to tell JavaScript what commands to run for that section.