Programmable Calculator

Enter a mathematical expression or define custom variables and run your own programmable script to get calculated results. Use the expression input, set variable values, and select an operation mode to compute outputs like result, step-by-step breakdown, and evaluated value. Great for scripting sequences, evaluating formulas, and chaining calculations.

Choose the type of calculation you want to perform.

Use standard operators: +, -, *, /, ^, sqrt(), sin(), cos(), tan(), log(), abs(). Use variable names like x, y, z.

Assign a numeric value to variable x used in your expression.

Assign a numeric value to variable y used in your expression.

Assign a numeric value to variable z used in your expression.

How many sequential values of x to evaluate (starting from x, incrementing by 1).

Number of decimal places to display in results.

Results

Evaluated Result (at x)

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Result with y substituted for x

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Result with z substituted for x

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Sum of Iteration Results

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Average of Iteration Results

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Expression Output Over Iterations

Results Table

Frequently Asked Questions

What operators and functions can I use in the expression field?

You can use standard arithmetic operators: +, -, *, /, and ^ for exponentiation. Supported functions include sqrt(), abs(), sin(), cos(), tan(), log() (base-10), and Math constants like PI. Write expressions naturally, e.g. sqrt(x^2 + y^2) or sin(x) * cos(y).

How do I use variables x, y, and z in my formula?

Simply include the letters x, y, or z in your expression and assign numeric values in the Variable fields below. The calculator substitutes your entered values before evaluating. For example, entering 3*x + y with x=4 and y=2 returns 14.

What does the 'Number of Iterations' setting do?

It evaluates your expression repeatedly, starting at your given x value and incrementing x by 1 each time. This is useful for seeing how your formula behaves over a range of inputs. The results are displayed both in the iterations table and plotted on the chart.

What is a programmable calculator used for?

Programmable calculators let you define custom formulas, assign variables, and run the same calculation logic multiple times with different inputs. They are commonly used in engineering, finance, science, and education to automate repetitive numerical computations.

How is this different from a regular scientific calculator?

A regular scientific calculator evaluates a fixed expression once. A programmable calculator lets you define variable placeholders, run iterative loops, and script sequences of operations — making it far more powerful for complex or repeated calculations.

Can I use trigonometric functions in my expression?

Yes. You can use sin(), cos(), and tan() directly in your formula. Note that these functions expect values in radians. To convert degrees to radians, multiply by Math.PI/180, e.g. sin(x * 3.14159 / 180).

Why does my expression return 'Invalid Expression'?

This usually happens when the formula contains unsupported syntax, unmatched parentheses, or an undefined function name. Double-check your operators (use * not ×), make sure all brackets are closed, and only use supported function names like sqrt(), log(), abs(), sin(), cos(), tan().

How is the 'Sum of Iterations' calculated?

The calculator evaluates your expression for each iteration, incrementing x by 1 each step starting from your input x value. It then adds all those individual results together. This is useful for computing discrete sums, like a simplified Riemann sum or a running total.

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