What are the keywords in Dart programming?
Dart keywords are reserved words or terms in the Dart programming language that the compiler interprets differently.
These keywords can’t be used as the name of a variable, class, or function.
Dart keywords are case sensitive and must be defined properly.
The Dart programming language has a total of 61 keywords.
Dart keywords
abstract | else | import | super |
as | enum | in | switch |
assert | export | interface | sync |
async | extend | is | this |
await | extension | library | throw |
break | external | mixin | true |
case | factory | new | try |
class | final | catch | false |
null | typedef | on | var |
const | finally | operator | void |
continue | for | part | while |
covariant | function | rethrow | with |
default | get | return | yield |
deferred | hide | set | do |
if | show | dynamic | implements |
static |
Examples
1. catch
catch is used with the try block to catch exceptions in the program.
Syntax:-
try {
// program that might throw an exception
}
catch Exception1 {
// code for handling exception 1
}
2. finally
finally is a block of codes that should be run even if the program encounters an exception. The finally block comes after the try block, and anytime an error occurs, control is passed to the finally block, which is then executed.
3. try
In Dart, the try block is used to keep those codes that can cause a program to crash. A try block is followed by at least one on/catch block or a finally block.
//using try, catch, var, finally keywordsvoid main() {int num = 20;try{var num2 = num ~/ 0;print(num2);}catch(e){print(e);}finally {print("End of program");}}
4. in
in is used in a for in loop to iterate over an iterable (such as a list or set).
void main() {var myList = [23, 42, 13, 15, 90];for (var item in myList)print(item);}
5. switch
The switch keyword is used in the switch case statement, which is a simplified version of the nested if-else statement.
6. default
In a switch case, if no condition matches, the default statement is executed.
7. `case
case is used with a switch statement.
8. break
break is used to end the loop and switch case when the condition is met.
//using keyword switch,case,default,breakvoid main(){int num = 2;switch (num) {case 1: {print("Shot 1");} break;case 2: {print("Shot 2");} break;case 3: {print("Shot 3");} break;default: {print("This is default case");} break;}}
