_________ is a diagrammatic representation of a program logic.

The correct answer is Flowchart.

Key Points 

• A flowchart is a diagrammatic representation of program logic.
• A flowchart illustrates a solution model for a given problem.
• A pictorial representation of the algorithm is called a flowchart.
• It is a popular means for describing computer algorithms.
• It is mainly used in analyzing, designing, documenting, or managing a process or program in various fields.
• The first structured method for document process flow was introduced by Frank and Lillian Gilbreth.

Additional Information 

• An algorithm expressed using a precise notation that can be executed by a computer is called a program.
• A program during execution is called Process.
• The collection of facts and figures are called data.