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Here are the steps to create a flow chart representing functions:

1. Identify the inputs and output of the function: Before creating a flow chart, identify the inputs and output of the function. This will help you to create the necessary shapes for the flow chart.

2. Decide on the symbols to use: There are several symbols that you can use in creating a flow chart, such as rectangles for processes, diamonds for decisions, and arrows for the flow of data. Decide on the symbols that are appropriate for your function.

3. Draw the first symbol: Start by drawing the first symbol for the process, which could be a rectangle. Label it with the name of the function.

4. Draw the subsequent symbols: Draw the subsequent symbols for the various processes involved in the function. Use arrows to connect the symbols and show the flow of data.

5. Add decision points: If the function involves decision points, use the diamond-shaped symbol to represent them. Label the diamond with the question that needs to be answered to proceed with the flow of data.

6. Add loops: If the function involves loops, use the oval-shaped symbol to represent them. Label the oval with the condition that needs to be met before the loop continues.

7. Complete the flow chart: Once you have drawn all the necessary symbols and connected them with arrows, review theflow chart to make sure it accurately represents the function.

8. Test the flow chart: To ensure that the flow chart represents the function accurately, test it with a few examples to make sure that the input leads to the expected output.