Home Dart Dart program to convert string to ASCII value (Code Units)

Dart program to convert string to ASCII value (Code Units)

0
dart program to convert striing to ascii value

Hi Guys, Welcome to Proto Coders Point.

In the Dart tutorial (Article), We will learn a basic program every beginner programmer should know, i.e. How to convert string character to ASCII value in dart programming language(code unit).

Introducation:

What is ASCII value?

ASCII stands for “American Standart code for informaton exchange”. Is used for character encoding standard for electronic communication.

In simple words ASCII is a technique used to get ASCII number of a character.

Here is a ASCII value chart for you for reference.

Eg: Suppose you want ascii value of character capital ‘R’, you can check above ascii chart we have R = 82, like wise for small letter ‘r’ = 114.

Ascii in dart – code unit in dart

In dart language, ascii is also know as code unit. In dart, each character is in UTF-16 form.

dart String class we have 2 methods to get code unit of a given character or also loop to string character to get all code units by each index of string value.


Dart codeUnitAt(index) & codeUnits methods

As i said above, String class in dart has 2 main method that can be used to convert string to ASCII in dart.

1. string.codeUnitAt(index)

The codeUnitAt method is used to get ascii/code unit of character in string using it’s index value.

int codeUnitAt(int index)

It accepts a integer parameter (i.e. index) and return a integer value of ASCII code.

As you all know that index value starts from ‘0’. i.e. 0 index is the first character of a string, 1 is second character of a string and so on. Have a look to example.

String name = "PROTO CODERS POINT";

so if you want to convert index 0 position from string, then you can simple do it by:-

name.codeUnitAt(0);  // here 0 is index value.

1. Dart code for converting character to ascii value

import 'dart:io';

void main() {
 
 String ch = 'R';
 print(' ASCII value of ${ch[0]} is ${ch.codeUnitAt(0)}');
 
}

output

character to ascii in dart

2. Looping through all character in string.

import 'dart:io';

void main() {
 
 String name = 'PROTO CODERS POINT';

 //loop to each character in string 
 for(int i = 0; i <name.length; i++){

   print(' ASCII value of ${name[i]} is ${name.codeUnitAt(i)}');

 }

}

Output


2. string.codeUnits

The string.codeUnits is used to get all the ascii value / code units of a given string & it returns code unit(ascii value) in list.

defined as:

List codeUnits

To get list of code unit(ascii value) of a given string simply pass the string to this method.

Eg: String name =''RAJAT";
print("ASCII list of given string ${name.codeUnits}.
import 'dart:io';

void main() {
 
 String name = 'PROTO CODERS POINT';
 
 //returns list of code unit value.
 print('Code Unit list: ${name.codeUnits}');
 
}

output


No Comments