array is the collection of similar data types(variables).
like when you have to store large number of same types then instead of declaring several variables you can make an array and save all the data in one single array.
Array is used to store same type of data. Array is kind of data structure that can store fixed size sequential collection of elements of the same data type.
Arrays in C act to store related data under a single variable name with an index, also known as a subscript. It is easiest to think of an array as simply a list or ordered grouping for variables of the same type. As such, arrays often help a programmer organize collections of data efficiently and intuitively.