The Input Required field specifies whether data entry input is required when menu displays a parameter form for menu variable assignment. If the Input Required field is no, menu does not require that the field contain data when the screen is stored. If the Input Required field is yes, menu requires that the field contain data. The operator can skip over the field and enter data in fields appearing on the screen after the required input field, but when the parameter form is stored, all input required fields must contain data. The rule used by a parameter form is that all input required fields must be nonblank. A numeric field with input required may have only the digit 0 entered to fulfill the input required rule, but it could not be left as all blanks. If the numeric field did not have required input, either of these two formats could be used to enter a zero value.