Using calculators is a fantastic way to do calculations with your client **directly in the meeting**: avoid Excel ROI files or incorrect number crunching! It also adds **a layer of interactivity** that makes the meeting more engaging.

There are several widgets that can interact with the calculator, such as **sliders and buttons**.

Using a calculator is much like typing an equation into an Excel field.

To learn how to build a calculation in Prezentor, watch the **video** below:

If you'd like explore **all the possible formulas** that you can use in the calculator bar, here is a list:

abs(x) - returns absolute value of x.

acos(x) - returns the arccosine of a number 'x' in radians

asin(x) - returns the arcsin of a number 'x' in radians

atan(x) - returns the arctangent of a number 'x' in radians

ceil(x) - rounds the number 'x' passed as parameter to its nearest integer in Upward direction of rounding

cos(x) - returns a numeric value between -1 and 1, which represents the cosine of the angle given in radians

sin(x) - returns the sine of a number 'x'

tan(x): returns the tangent of a number 'x'

exp(x) - returns the value of Ex, where E is Euler's number and x is the number passed to it

floor(x) - decreases the given number up to the closest integer value

log(x) - returns the natural logarithm (base E) of a 'x'

pow(base, exponent) - returns a number representing the given base raised to the power of the given exponent

random() - random number between [0, 1]

sqrt(x) - square root of number x

if(if_value,then_value,else_value) - if statement

and(x,y) - logical 'and'

or(x,y) - logical 'or'

not(x) - logical 'not'

xor(x,y) - logical 'xor'

SUM(x1, x2, ..., x(n))

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