Answer:
cout <<showpoint << x; is the statement which prints the decimal point, but without forcing scientific.
Explanation:
The showpoint function in c++ print the decimal point number without forcing scientific.The showpoint function set the showpoint format flag for the str stream in c++.
Following are the program in c++
#include<iostream> //header file
using namespace std; // namespace
int main() // main function
{
double x=90.67; // double variable
cout <<showpoint << x; // display x without forcing scientific
return 0;
}
Output
90.6700
Ask your friend to tell you the password
Answer:
- import math
-
- def standard_deviation(aList):
- sum = 0
- for x in aList:
- sum += x
-
- mean = sum / float(len(aList))
-
- sumDe = 0
-
- for x in aList:
- sumDe += (x - mean) * (x - mean)
-
- variance = sumDe / float(len(aList))
- SD = math.sqrt(variance)
-
- return SD
-
- print(standard_deviation([3,6, 7, 9, 12, 17]))
Explanation:
The solution code is written in Python 3.
Firstly, we need to import math module (Line 1).
Next, create a function standard_deviation that takes one input parameter, which is a list (Line 3). In the function, calculate the mean for the value in the input list (Line 4-8). Next, use the mean to calculate the variance (Line 10-15). Next, use sqrt method from math module to get the square root of variance and this will result in standard deviation (Line 16). At last, return the standard deviation (Line 18).
We can test the function using a sample list (Line 20) and we shall get 4.509249752822894
If we pass an empty list, a ZeroDivisionError exception will be raised.
