# Arduino Questions and Answers – Mathematical Functions

This set of Arduino Questions and Answers for Experienced people focuses on “Mathematical Functions”.

1. What is the math function to find out the minimum of 2 numbers?
a) The min() function
b) The minimum_number() function
c) The m() function
d) The minimumOf() function

Explanation: The min() function takes in 2 arguments and outputs only 1 number. This function finds out the minimum of the 2 numbers that are entered as arguments to the function. This function is essential in sorting techniques.

2. What is the math function to find out the maximum of 2 numbers?
a) The maximumOf() function
b) The maximum_number() function
c) The max() function
d) The m() function

Explanation: The max() function takes in 2 arguments and outputs only 1 number. This function finds out the maximum of the 2 numbers that are entered as arguments to the function. This function is essential in sorting techniques.

3. What is the maximum number of arguments for the constrain() function?
a) 1
b) 2
c) 3
d) 4

Explanation: The constrain() function is used to restrict the output from going below or above a certain minimum or maximum number respectively. It takes three arguments; the number to be contrained, the minimum value, and the maximum value.

4. What is the maximum number of arguments for the map() function?
a) 1
b) 3
c) 5
d) 7

Explanation: The map() function is used to map a number from one number set to another number set. It takes three arguments; the number to be mapped, the lowest number of the source number set, the highest number of the source number set, the lowest number of the destination number set, the highest number of the destination number set.

5. What is the purpose of the pow(x,y) function?
a) To find xy
b) To find yx
c) To find ex
d) To find 10y

Explanation: The pow() function is used to find the value of a number raised to another number. It takes two arguments; the base, and the exponent. The input datatypes are of the float datatype and the output is of the double datatype.
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6. What is the use of the sqrt() function?
a) To find the square of a number
b) To find the square root of a number
c) To find the cube root of a number
d) To find the cube of a number

Explanation: The sqrt() function is used to find the square root of a number. It takes one argument; the number whose square root is to be found out. This function can accept any number-based datatypes and gives the output in the double datatype.

7. What is the use of the sq() function?
a) To find the square root of a number
b) To find the square of a number
c) To find the cube of a number
d) To find the cube root of a number

Explanation: The sq() function is used to find the square of a number. It takes one argument; the number whose square is to be found out. This function can accept any number-based datatypes and gives the output in the double datatype.

8. What is the use of the cos() function?
a) To find the cosine of a number
b) To find the sine of a number
c) To find the tan of a number
d) To find the inverse cosine of a number

Explanation: The cos() function is used to find the cosine of a number. It takes one argument; the number whose cosine is to be found out. This number is to be entered in the radian format and not the degree format. This function can accept any number-based datatypes and gives the output in the double datatype.

9. What is the use of the sin() function?
a) To find the sine of a number
b) To find the cosine of a number
c) To find the tan of a number
d) To find the inverse tan of a number

Explanation: The sin() function is used to find the sine of a number. It takes one argument; the number whose sine is to be found out. This number is to be entered in the radian format and not the degree format. This function can accept the float datatype and gives the output in the double datatype.

10. What is the use of the tan() function?
a) To find the sine of a number
b) To find the cosine of a number
c) To find the tan of a number
d) To find the inverse tan of a number

Explanation: The tan() function is used to find the tangent of an angle. It takes one argument; the angle whose tangent is to be found out. This number is to be entered in the radian format and not the degree format. This function can accept the float datatype and gives the output in the double datatype.

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