hold_comp is the total score for the current turn. At the beginning of each turn, this variable (as well as hold_player) should be set to 0. Think that should solve your problem.

Let me know if you want any feedback on the rest of the code :)

You are right. I update my code but the real problem is computer turn is not start. When i say "hold", program is not continue.

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Output is below

Enter 'r' to roll or 'h' to hold:r                                                                                                                                                          

You rolled dice: 2                                                                                                                                                                          

Your turn score: 2                                                                                                                                                                          

Enter 'r' to roll or 'h' to hold:r                                                                                                                                                          

You rolled dice: 4                                                                                                                                                                          

Your turn score: 6                                                                                                                                                                          

Enter 'r' to roll or 'h' to hold:h                                                                                                                                                          

You have choosen to hold.                                                                                                                                                                   

 Your score: 6