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What are characters used in Base64 Encoding?

Base64 Encoding is normally used to encode stream of bytes (text from file, photo from device etc.) to a character representation that further can be transmitted over the wire as String and decoded it back on the receiving end to get the original bytes.

The following is the character set used in base 64 Encoding. It has A to Z, a to z, 0 to 9 and + / =

         0 => A            17 => R            34 => i            51 => z
         1 => B            18 => S            35 => j            52 => 0
         2 => C            19 => T            36 => k            53 => 1
         3 => D            20 => U            37 => l            54 => 2
         4 => E            21 => V            38 => m            55 => 3
         5 => F            22 => W            39 => n            56 => 4
         6 => G            23 => X            40 => o            57 => 5
         7 => H            24 => Y            41 => p            58 => 6
         8 => I             25 => Z            42 => q            59 => 7
         9 => J             26 => a            43 => r            60 => 8
        10 => K           27 => b            44 => s            61 => 9
        11 => L            28 => c            45 => t            62 => +
        12 => M           29 => d            46 => u            63 => /
        13 => N           30 => e            47 => v
        14 => O           31 => f            48 => w           (pad) =
        15 => P            32 => g            49 => x        
        16 => Q            33 => h            50 => y
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