How to Get the Ascii Value of a Character

Convert character to ASCII numeric value in java

Very simple. Just cast your char as an int.

char character = 'a';    
int ascii = (int) character;

In your case, you need to get the specific Character from the String first and then cast it.

char character = name.charAt(0); // This gives the character 'a'
int ascii = (int) character; // ascii is now 97.

Though cast is not required explicitly, but its improves readability.

int ascii = character; // Even this will do the trick.

How to get the ASCII value of a character

From here:

The function ord() gets the int value
of the char. And in case you want to
convert back after playing with the
number, function chr() does the trick.

>>> ord('a')
97
>>> chr(97)
'a'
>>> chr(ord('a') + 3)
'd'
>>>

In Python 2, there was also the unichr function, returning the Unicode character whose ordinal is the unichr argument:

>>> unichr(97)
u'a'
>>> unichr(1234)
u'\u04d2'

In Python 3 you can use chr instead of unichr.

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ord() - Python 3.6.5rc1 documentation

ord() - Python 2.7.14 documentation

How to get the ASCII value in JavaScript for the characters

Here is the example:

var charCode = "a".charCodeAt(0);

console.log(charCode);

What's the simplest way to convert from a single character String to an ASCII value in Swift?

edit/update Swift 5.2 or later

extension StringProtocol {
    var asciiValues: [UInt8] { compactMap(\.asciiValue) }
}

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"abc".asciiValues  // [97, 98, 99]

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In Swift 5 you can use the new character properties isASCII and asciiValue

Character("a").isASCII       // true
Character("a").asciiValue    // 97

Character("á").isASCII       // false
Character("á").asciiValue    // nil

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Old answer

You can create an extension:

Swift 4.2 or later

extension Character {
    var isAscii: Bool {
        return unicodeScalars.allSatisfy { $0.isASCII }
    }
    var ascii: UInt32? {
        return isAscii ? unicodeScalars.first?.value : nil
    }
}

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extension StringProtocol {
    var asciiValues: [UInt32] {
        return compactMap { $0.ascii }
    }
}

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Character("a").isAscii  // true
Character("a").ascii    // 97

Character("á").isAscii  // false
Character("á").ascii    // nil

"abc".asciiValues            // [97, 98, 99]
"abc".asciiValues[0]         // 97
"abc".asciiValues[1]         // 98
"abc".asciiValues[2]         // 99

How to get character for a given ascii value

Do you mean "A" (a string) or 'A' (a char)?

int unicode = 65;
char character = (char) unicode;
string text = character.ToString();

Note that I've referred to Unicode rather than ASCII as that's C#'s native character encoding; essentially each char is a UTF-16 code point.

How to get ASCII value of a character

To my understanding the ASCII value can be obtained directly from the char representation as follows.

Select(x => new CharacterFrequency()
                {
                  Char = x.Key,
                  Frequency = x.Count(),
                  Ascii = (byte)x.Key
                }
)

How to get ASCII value of string in C#

From MSDN

string value = "9quali52ty3";

// Convert the string into a byte[].
byte[] asciiBytes = Encoding.ASCII.GetBytes(value);

You now have an array of the ASCII value of the bytes. I got the following:

57
113
117
97
108
105
53
50
116
121
51

Getting character ASCII value as an Integer in Swift

In Swift, a Character may not necessarily be an ASCII one. It would for example have no sense to return the ascii value of "quot; which requires a large unicode encoding. This is why asciiValue property has an optional UInt8 value, which is annotated UInt8?.

The simplest solution

Since you checked yourself that the character isAscii, you can safely go for an unconditional unwrapping with !:

var tempo:Int = Int(n.asciiValue!)     // <--- just change this line

A more elegant alternative

You could also take advantage of optional binding that uses the fact that the optional is nil when there is no ascii value (i.e. n was not an ASCII character):

if let tempo = n.asciiValue   // is true only if there is an ascii value
{
    temp += (Int(tempo) | key) 
}

Convert character to ASCII code in JavaScript

"\n".charCodeAt(0);

Is there a function that returns the ASCII value of a character? (C++)

char c;
int ascii = (int) c;
s2.data[j]=(char)count;

A char is an integer, no need for conversion functions.

Maybe you are looking for functions that display integers as a string - using hex, binary or decimal representations?

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