Here is a flowchart to input a number and check if it is greater than 100 or not:

Start ├─ Input number ├─ Is number > 100? │ ├─ Yes │ │ ├─ Display "Number is greater than 100" │ │ └─ End │ └─ No │ ├─ Display "Number is not greater than 100" │ └─ End End

In this flowchart, the program starts by prompting the user to input a number. Then, it checks if the number is greater than 100. If it is, it displays the message “Number is greater than 100” and ends. If the number is not greater than 100, it displays the message “Number is not greater than 100” and ends.