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What are the rule used in naming a variable Give examples?

variable is a character or number sequence of a character is called array name


Why not a variable in java is declared starting with a numeric character?

The most likely reason for this is that allowing variable names to start with a number would introduce ambiguity as to whether a word is a variable or a number. As it is, the compiler can tell which is which just by examining the first character.


In many languages it is an error to assign a real number to an integer variable True or False?

true


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.


Is number of mistakes a discrete variable?

Yes. You cannot make 2.3 mistakes.


How many values can store a variable at a time?

The number of values a variable can store at a time depends on the data type of the variable. For example, a variable of type int (integer) in many programming languages can store a single integer value at a time. Similarly, a variable of type float (floating-point number) can store a single floating-point value. Other data types like arrays or lists can store multiple values at a time. The capacity of a variable to store values is determined by its data type and memory allocation.


what are all the variables in an experiment?

The variable is the thing that changes - there are literally an infinite number of possible variables so they cannot be listed. Each experiment has its own variable.


A what variable has a value that is read only and cannot be changed during the programs execution?

In most languages this is called a constant.***edit***Ty for the answer, I just wanted to throw in the page number for ITT-Tech students.named constantpage 62Programming Logic and Design by Tony Gladdis


Is an independent variable defined to be a variable that is to be predicted or estimated?

neither, an independent variable is a variable not being changed in the process of a science experiment. A variable in math cannot be described, only purpose of a variable is to take place of a number that you are trying to figure out in some equations. Others are equations with no solution.


How do you solve x in math?

You cannot solve 'x' in math unless the other number has a variable as well.


What number cannot be expressed in roman figures?

The Romans had no character to represent zero.


How do you read this number QJ16952000973?

You cannot because the first character is not a numerical digit.