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What is a variables in java?
A variable in java is something that holds a value and has a name attached to it. This value can change and hence its named a variable.There are two types of variables in Java:• Primitives - A primitive variable can be one of eight types: char, boolean, byte, short, int, long, double, or float. Once a primitive has been declared, its primitive type can never change, although in most cases its value can change.• Reference variables - A reference variable is used to refer to (or access) an object. A reference variable is declared to be of a specific type and that type can never be changed.
Can you add a variable with a number?
Yes, IF the variable has been declared, has a value, and is of a numerical type such that your addition operator can perform the operation on the number and the value of that type variable. The compiler or interpreter will look up the variable's value, substitute it for the variable, and perform the addition just as if your statement used two numbers. First example: If your number is an integer and your variable is of type real, almost any addition operator can successfully add the two. Second example: If your number is a real and your variable is a character type (with a value, say, of "Smith"), the addition will obviously fail. In many languages, however, variables of type Boolean may be handled arithmetically, as the value True equals 1 and False is zero.
Loss of precision error in java?
A loss of precision error occurs when you use a variable of a data type that holds more decimal values than the type of the variable you are converting/inserting to.
What value is assigned to extern variable?
Default initial value of extern integral type variable is zero otherwise null.
What is default value of Boolean type variable?
False will be the default value of the boolean datatype in java
What is the difference between data and variable?
data type refers to the kind of value that is held by a particular variable. For ex: an int variable contains integer value, a string holds a alpha numeric value etc. variable refers to the name of a value using which we can refer to this value. Ex: public int age = 28; here int is the data type and age is the variable.
What are the components of a variable?
A variable typically consists of a name, a data type, a value, and a memory location where the value is stored. The name is used to reference the variable in the code, the data type defines the type of data the variable can hold, the value is the actual data stored in the variable, and the memory location is where the value is stored in the computer's memory.
How close the measured value is the the accepted value?
This value is variable, for each type of measurement.
What is the use of variables in c language?
Variable is of any Data Type and Data Type can be defined as a type of value that a Variable will hold.............means which type of value you want to store, eg: fractional value (3.5454), whole value (3,76,3,67), character value (a,v,c,f,b,z) etc.......... So The Use the Variable is to store a value of any kind (some mentioned above)
What is a variables in java?
A variable in java is something that holds a value and has a name attached to it. This value can change and hence its named a variable.There are two types of variables in Java:• Primitives - A primitive variable can be one of eight types: char, boolean, byte, short, int, long, double, or float. Once a primitive has been declared, its primitive type can never change, although in most cases its value can change.• Reference variables - A reference variable is used to refer to (or access) an object. A reference variable is declared to be of a specific type and that type can never be changed.
What is the difference between value type parameters and reference type parameters?
When a variable is passed by value, the function receives a copy of the variable. When a variable is passed by reference, the function receives a reference, or pointer, to the original data.
What two things must you nor normally specify in a variable declaration?
In most programming languages, you do not need to specify the variable's type and initial value in a variable declaration. The type is usually inferred from the assigned value, and the initial value can be set separately if needed.
Can you add a variable with a number?
Yes, IF the variable has been declared, has a value, and is of a numerical type such that your addition operator can perform the operation on the number and the value of that type variable. The compiler or interpreter will look up the variable's value, substitute it for the variable, and perform the addition just as if your statement used two numbers. First example: If your number is an integer and your variable is of type real, almost any addition operator can successfully add the two. Second example: If your number is a real and your variable is a character type (with a value, say, of "Smith"), the addition will obviously fail. In many languages, however, variables of type Boolean may be handled arithmetically, as the value True equals 1 and False is zero.
How do you use define in C?
Just type declare then the variable that you desire to assigned a certain constant value on it. Just type declare then the variable that you desire to assigned a certain constant value on it.
What defines a data type?
the type of data which we store in a variable.. example: int a=10; /*here a is variable (data) which is of type int and stores a value 10.*/
What are java variables?
It is something that holds a value. ex: string holds text. char holds one character. integer holds numbers. etc They can be declared by... string myWords = "Hello, World!"; System.out.println(myWords); This code will make a console say whatever is inside of that variable, which happens to be: "Hello, World!".
Loss of precision error in java?
A loss of precision error occurs when you use a variable of a data type that holds more decimal values than the type of the variable you are converting/inserting to.
