The Criminal Procedure Code is a comprehensive legislation that governs the procedure to be followed in criminal cases in India. It provides guidelines on how criminal offences are classified, investigated, and tried. The code classifies offences into different categories based on their nature and seriousness.

Cognizable and Non-Cognizable Offences:
One classification provided by the Criminal Procedure Code is cognizable and non-cognizable offences. Cognizable offences are those for which a police officer can arrest a person without a warrant and start an investigation. These offences are generally more serious in nature and carry higher penalties. Examples of cognizable offences include murder, rape, theft, etc. On the other hand, non-cognizable offences are relatively less serious, and the police cannot arrest a person without a warrant. In such cases, the police need to obtain permission from a magistrate before starting an investigation.

Bailable and Non-Bailable Offences:
Another classification under the Criminal Procedure Code is bailable and non-bailable offences. Bailable offences are those for which the accused person can secure bail from the police or the court. Bail refers to the temporary release of an accused person on the condition that they will appear for all court proceedings. These offences are generally less serious, and the accused can be granted bail as a matter of right. Non-bailable offences, on the other hand, are more serious, and bail is not granted as a matter of right. In such cases, the accused person needs to approach the court and provide valid reasons for granting bail.

Summons Cases and Warrant Cases:
The Criminal Procedure Code also classifies cases as summons cases and warrant cases. Summons cases are those in which the court issues a summon to the accused, directing them to appear in court on a specified date. These cases generally involve less serious offences and carry lesser penalties. Warrant cases, on the other hand, are those in which the court issues a warrant for the arrest of the accused. These cases generally involve more serious offences and carry higher penalties.

Overall, the Criminal Procedure Code provides for the classification of offences into cognizable and non-cognizable offences, bailable and non-bailable offences, and summons cases and warrant cases. These classifications help in determining the procedure to be followed during the investigation and trial of criminal cases.