hex()

Converts a number to a hexadecimal string or parses a hexadecimal string to a number.

hex(value)

• If `value` is a number, returns a hexadecimal string representation.
• If `value` is a valid hexadecimal string, returns the corresponding number.
• Returns an error if the string contains invalid characters.

Convert number to hex

hex(255);    // returns "FF"

hex(16);     // returns "10"

Convert hex string to number

hex("FF");   // returns 255

hex("0x1A"); // returns 26

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