If Else

int i = 2;
if (i < 2) {
  System.out.println("i is less than 2");
} else {
  System.out.println("i is greater than 2");
}

An if statement executes code conditionally depending on the result of the condition in parentheses. When condition in parentheses is true it will enter to the block of if statement which is defined by curly braces like \{ and \}. opening bracket till the closing bracket is the scope of the if statement.

The else block is optional and can be omitted. It runs if the if statement is false and does not run if the if statement is true Because in that case if statement executes.

See also: Ternary If