Character Codes and UTF-8
Representing characters as numbers
Computers store characters as numbers too. Unicode and UTF-8 can represent characters from all over the world.
What you'll learn from this poster
- Character codesGive each character a number / e.g. A = 65 / Computers store numbers
- UnicodeUnifies the world's characters / Includes emoji / Uses 'code points'
- UTF-8Uses 1-4 bytes / ASCII is 1 byte / Japanese ~3 bytes, emoji 4
- Characters vs bytesOne visible char != one byte / Emoji need care to count / UTF-8 is the global standard
UTF-8 can represent the world's characters
Usage: Free to print and display for learning at school or home (no sign-up). High-resolution portrait PNG (1024×1536); A3 or larger is recommended. Please do not sell, use commercially, or redistribute modified versions.