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isxdigit

isxdigit(c::Union{Char,AbstractString}) -> Bool

Tests whether a character is a valid hexadecimal digit, or whether this is true for all elements of a string.

Examples

julia> isxdigit('A')
true

julia> isxdigit('9')
true

julia> isxdigit('G')
false

julia> isxdigit("abc123")
true

julia> isxdigit("123!")
false

The isxdigit function in Julia is used to test whether a character is a valid hexadecimal digit. It can also be used to check if all characters in a string are valid hexadecimal digits.

The function returns true if the character or all characters in the string are valid hexadecimal digits, and false otherwise.

Common examples of its use include:

1. Check if a character is a valid hexadecimal digit:

   julia> isxdigit('A')
   true

   This example checks if the character 'A' is a valid hexadecimal digit. Since 'A' is indeed a valid hexadecimal digit, the function returns true.

2. Check if a character is a valid hexadecimal digit:

   julia> isxdigit('9')
   true

   Here, the function checks if the character '9' is a valid hexadecimal digit. Since '9' is a valid hexadecimal digit, the function returns true.

3. Check if a character is a valid hexadecimal digit:

   julia> isxdigit('G')
   false

   In this example, the function checks if the character 'G' is a valid hexadecimal digit. Since 'G' is not a valid hexadecimal digit, the function returns false.

4. Check if all characters in a string are valid hexadecimal digits:

   julia> isxdigit("abc123")
   true

   Here, the function checks if all characters in the string "abc123" are valid hexadecimal digits. Since all the characters in the string are valid hexadecimal digits, the function returns true.

5. Check if all characters in a string are valid hexadecimal digits:

   julia> isxdigit("123!")
   false

   This example checks if all characters in the string "123!" are valid hexadecimal digits. Since '!' is not a valid hexadecimal digit, the function returns false.

Note: The isxdigit function can also be used with characters and strings in other languages, as long as the character encoding supports hexadecimal digits.

See Also

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