Assigning values to enum values outside enum declaration can be achieved by using a technique called “enum extension.” This allows us to assign custom values to each enum value, providing more flexibility in representing data.<\/p>\n
By default, enum values are automatically assigned sequential integer values starting from 0. However, in certain situations, it might be necessary to assign different or specific values to enum members. Here’s how you can assign custom values to enum values outside the enum declaration:<\/p>\n
enum Colors {
\n Red,
\n Blue = 5,
\n Green,
\n Purple = 10,
\n Yellow
\n}<\/code><\/pre>\nIn the example above, the enum Colors<\/code> has five members: Red<\/code>, Blue<\/code>, Green<\/code>, Purple<\/code>, and Yellow<\/code>. By explicitly assigning values to some of the members, we can control their assigned values, resulting in a non-sequential sequence.<\/p>\nThe value Red<\/code> is assigned 0 by default since we didn’t explicitly assign it a value. However, we assigned 5 to Blue<\/code>, which makes it have a value of 5. Green<\/code> comes next with a value of 6 (since enum values increment by 1), and subsequently, Purple<\/code> has a value of 10. Finally, Yellow<\/code> gets assigned 11.<\/p>\nIt’s essential to note that once a custom value is assigned to an enum member, the subsequent members continue with sequential values from that point.<\/b><\/p>\n
Here’s an example demonstrating the usage of the Colors<\/code> enum:<\/p>\nlet color: Colors = Colors.Green;
\nconsole.log(color); \/\/ Output: 6<\/code><\/pre>\nThe above code snippet assigns the value Green<\/code> to the variable color<\/code> of type Colors<\/code>. When we print the value of color<\/code>, it displays 6, confirming that the assigned value of Green<\/code> is indeed 6.<\/p>\n