How to convert Text to Hex by Arduino

Dear Sir,

i want to convert Text to Hex

exam,
abc --> 61 62 63

could you advise how to do this

thank you

They already are hex (or decimal, binary octal . . ).

The "Text" is already in a HEX format.
Example: If you want to output it by serial communication:

Serial.println(Variable, HEX);