Chapter 2 | Identifiers in Dart

If we want to make identifiers in Dart, we need to follow some rules.

• Identifiers can include both, characters and digits. However, the identifier cannot begin with a digit.
• Identifiers cannot include special symbols except for underscore ( _ ) or a dollar sign ($).
• Identifiers cannot be keywords.
• They must be unique.
• Identifiers are case-sensitive.
• Identifiers cannot contain spaces.

Here’s the source code (wait for it load):

Some examples of Valid Identifiers in Dart:

• firstName
• first_name
• num1
• $num1
• Var

Some examples of Invalid Identifiers in Dart:

• var // because it is pre-defined keyword in dart
• first name // because it contains space
• first-name // because it contains special character `-`
• 1number // because it starts with a number

Great, in this chapter we learned about Identifiers. So, this is it for this chapter. Bbye, see you in the next one.