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Can you initilise the value of a constant with the value of a variable

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Whether or not you can do it depends on the programming language. In terms of best practice, it's usually frowned upon to initialize a constant using a variable.
The reason for this is that if it your value is truly a constant (e.g. pi) you'd know the value beforehand and would be able to hardcode it. Initializing a constant using a variable, implies that it's not constant and thus should be declared as a variable and not as a constant.

Posted on Mar 28, 2011


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What is an dependent variable

All values that arise as influenced by changes in the values of other variable. Or, Dependent Variable is the observed factor.
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A quantity that can vary independently on any other quantity in the situation being studied. When a independent variable changes it value, the value of the dependent variable changes in accordance with the rule that links the two variables. As a worker, you can decide of your own free will to work 10 hours or 40 hours per week (the number of hours worked is the independent variable). Depending on the course of action you choose (10 or 40, or 0 hours), your weekly salary will vary according to the pay-formula.
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How to write this problem in code

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Program that will compute the volume of a cone

Volume of right circular cone is (1/3)*PI*(r^2)*H
Define real variables r, h
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Dec 27, 2013 | Computers & Internet

1 Answer

A program that will compute the volume of a cone

Volume of right circular cone is (1/3)*PI*(r^2)*H
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Define constant PI or use built in name.
Prompt for input r=?
Read value and store in r
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1 Answer

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Sorry to be the bearer of bad news, but the HP 10S calculator does not perform matrix calculations.
You have 9 variables A to F, M, X and Y. You can use them to store data, constants, calculation results, and other numerical values.
To store say the value 5674 in Variable A you press the key sequence 5 6 7 4 [SHIFT] [STO] A.
To recall the value stored in A (and use it in another calculation) you press [ALPHA] [A]. It will be displayed and you can do with it any calculation you want.
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You will have to read the manual starting from page 23.

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Need help with rate of change and direct variation

No need for a claculator to understand these concepts.
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How do you enter your variable?

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1 Answer

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nDeriv ( expression, variable, value, epsilon)

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variable: the name of the variable in the expression above (usually x)
value: the numerical value of the e x where you evaluate the derivative
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To use default value of epsilon
nDeriv ( expression, variable, value)

To use a different epsilon, ex 1x10^(-4)
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nDeriv( A^3 , A, 5., 0.0001) should give you 75

Hope it helps.

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