## Questions and Answers

What is the output of `factorial(6)`

in the given code snippet?

720

What does the `is_armstrong`

function determine about a number?

If it is an Armstrong number

In the given code, what is the output when `is_armstrong(123)`

is called?

FALSE

What is the result of `min(numbers)`

in the code snippet?

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The `Find_Prime_No`

function in the code snippet is used to determine whether a given number:

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`Find_Prime_No(6)`

would return:

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What is the output when `is_armstrong(9474)`

is called in the given code snippet?

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In the code snippet, what happens when `Find_Prime_No(17)`

is executed?

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What is the output of `maximum`

variable in the code snippet?

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What does the `min`

function calculate in the `numbers`

vector?

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Which statement accurately describes what the `Find_Prime_No`

function does?

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When `factorial(0)`

is called, what is the output?

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## Study Notes

### Factorial Function

- The factorial function calculates the product of all positive integers less than or equal to a given number.
- factorial(6) returns 720.
- factorial(4) returns 24.
- factorial(0) returns 1.

### Armstrong Number

- An Armstrong number is a number that is equal to the sum of its own digits, each raised to the power of the number of digits.
- The function
`is_armstrong`

checks if a number is an Armstrong number. - 153, 371, and 9474 are Armstrong numbers.
- 123 is not an Armstrong number.

### Minimum and Maximum Values

- The
`min`

function returns the minimum value in a set of numbers. - The
`max`

function returns the maximum value in a set of numbers. - In the set of numbers {5, 2, 9, 1, 7}, the minimum value is 1 and the maximum value is 9.

### Prime Number

- A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself.
- The function
`Find_Prime_No`

checks if a number is prime. - 13 is a prime number.
- The
`Find_Prime_No`

function uses a loop to check if a number is divisible by any number from 2 to n-1, where n is the input number. If it is not divisible, it returns TRUE, indicating that the number is prime.

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