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[2201.8.x] Update const BBE #4713

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[2201.8.x] Update const BBE #4713

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1b317c4
Add list constant and map constant examples
prakanth97 Jul 14, 2023
d250c9f
Refactor code
prakanth97 Aug 7, 2023
9c57984
Update comments
prakanth97 Aug 8, 2023
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11 changes: 9 additions & 2 deletions examples/const-and-final/const_and_final.bal
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Original file line number Diff line number Diff line change
@@ -1,15 +1,22 @@
import ballerina/io;

const int MAX_VALUE = 1000;

// Constants can be defined without the type. Then, the type is inferred from the right-hand side.
const MAX_VALUE = 1000;
const URL = "https://ballerina.io";

// The value for variable `msg` can only be assigned once.
// Mapping and list constants can also be defined.
const HTTP_OK = {httpCode: 200, message: "OK"};
const ERROR_CODES = [200, 202, 400];

// The value for the `msg` variable can only be assigned once.
final string msg = loadMessage();

public function main() {
io:println(MAX_VALUE);
io:println(URL);
io:println(HTTP_OK);
io:println(ERROR_CODES);
io:println(msg);
}

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4 changes: 2 additions & 2 deletions examples/const-and-final/const_and_final.metatags
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@@ -1,2 +1,2 @@
description: This BBE demonstrates how const and final values are used in Ballerina.
keywords: ballerina, ballerina by example, bbe, const, final
description: This BBE demonstrates how `const` and `final` values are used in Ballerina.
keywords: ballerina, ballerina by example, bbe, const, final, map const, list const
2 changes: 2 additions & 0 deletions examples/const-and-final/const_and_final.out
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@@ -1,4 +1,6 @@
$ bal run const_and_final
1000
https://ballerina.io
{"httpCode":200,"message":"OK"}
[200,202,400]
Hello World
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