What does it mean by null in programming?

In computer programming, null is both a value and a pointer. Null is a built-in constant that has a value of zero. It is the same as the character \0 used to terminate strings in C. Null can also be the value of a pointer, which is the same as zero unless the CPU supports a special bit pattern for a null pointer.

Company has asked employees for suggestions on ways to personalize the retail customer's shopping experience. they want to supplement traditional appeals to the customer. you have come up with several ideas. select the idea or ideas you have decided to submit.c. designate two of the curtained areas in the women's dressing room for nursing mothers  d. tailor merchandise in each store to the preferences of customers in that geographical region