Parallel arrays are those arrays which are used to store some records which needs more than one array to hold a entry but are interrelated and should be accessed by same index number. As they are of different data types so can't be stored as multi-dimensional array or matrix. Then parallel array comes to rescue. For example : Details of a student.
Name, age and ID of a student needs to be stored. So, three arrays can be made and each entry should be accessed by same index number.
