Answer:
The answer is "variables".
Explanation:
It is necessary to declare a variable privately when declaring a class because the private variable 'protects' the code while it is in operation. It may not aim to protect it at this stage from changing the codes themselves for other developers. Its purpose of the so-called "data hiding" is to hold the internal data from many other classes using the class protected.
Answer:
Primary key retains its uniqueness even after you remove some of the fields.
Explanation:
I am assuming that this question is related to database. Therefore, I am answering it according to database context.
In database, you can have multiple rows and columns. Each column shows a specific attribute while each row plots the data according to the attributes. However, there is the first column of each of main table that has unique set of values. It is called the Primary Key. Some key features of primary key are:
- It always contains the unique value.
- Its value cannot be null.
- A table can have at max one primary key.
- It can be the combination of multiple columns but it must be unique.
Therefore, the primary key has the ability to retain its uniqueness even after you remove some of the fields.
Following are the program to calculate the power of two:
Program Explanation:
- Defining an integer variable "i" that hold an integer value.
- Defining a for loop that checks "i" value in between 20, inside this it calculates power of two.
- At the last use print method to print its value.
Program:
i=1#holding integer value in i
for i in range(20):#defining a for that starts 1 to 20
i = 2 ** i#calculate power of 2 in i variable
print(i)#print value
Output:
Please find the attached file.
Learn more:
brainly.com/question/23170807
