By: aathishankaran in Java Tutorials on 2007-02-01
Variables are used to hold data in memory. For every variable used, there should be and appropriate declaration. If 100 numbers are to be accepted, then 100 different variable declarations are required.
In many applications, more than 100 variables are required, in such cases, the entire task of variable declaration and working with the variables becomes quite inconvenient.
Arrays are the solution to this problem. They play an important role in problem-solving wherever a large number of variables are to be used.
An array is a group of elements that has a common name, and array elements are differentiated from one another by their positions within the array
Arrays, like variable, should also be declared before being used, an array containing five elements, all of which are integers, can be declared as follow:
The name of the array cannot be the same as that of any other variable declared within the same program the size of the array, specified by the number 5 within square brackets, indicates how many elements are to be allocated to the array Num_array.
As with regular variables, the declaration does not assign values; it reserves memory for the array, the dimension used to declare an array must always be a positive integer constant.
The array subscript number starts from 0. Thus, the elements in the array Num_array are:
The following statements assign values to each element of integer array called Num_array:
Num_array = 10;
Num_array = 20;
Num_array = 30;
Num_array = 40;
Num_array = 50;
Each element of an array can be referred anywhere in a program just like a variable.
An array name must be chosen according to the rules used for naming other variables.
This policy contains information about your privacy. By posting, you are declaring that you understand this policy:
- Your name, rating, website address, town, country, state and comment will be publicly displayed if entered.
- Aside from the data entered into these form fields, other stored data about your comment will include:
- Your IP address (not displayed)
- The time/date of your submission (displayed)
- Your email address will not be shared. It is collected for only two reasons:
- Administrative purposes, should a need to contact you arise.
- To inform you of new comments, should you subscribe to receive notifications.
- A cookie may be set on your computer. This is used to remember your inputs. It will expire by itself.
This policy is subject to change at any time and without notice.
These terms and conditions contain rules about posting comments. By submitting a comment, you are declaring that you agree with these rules:
- Although the administrator will attempt to moderate comments, it is impossible for every comment to have been moderated at any given time.
- You acknowledge that all comments express the views and opinions of the original author and not those of the administrator.
- You agree not to post any material which is knowingly false, obscene, hateful, threatening, harassing or invasive of a person's privacy.
- The administrator has the right to edit, move or remove any comment for any reason and without notice.
Failure to comply with these rules may result in being banned from submitting further comments.
These terms and conditions are subject to change at any time and without notice.
Most Viewed Articles (in Java )
Latest Articles (in Java)
- Data Science
- React Native
- Cloud Computing
- Java Beans
- Mac OS X
- Office 365
- Tech Reviews