Create a row vector of length n, filled with 4's, for example, if n = 3
output = [4 4 4]
make sure to round UP when n is a decimal, and take the absolute value when n is negative
Swap the first and last columns
sum of non-primes
y equals x divided by 2
MATLAB Basic: rounding II
Matlab Basics II - Unit Conversion
Matlab Basics - Absolute Value
Matlab Basics - Rounding III
Finding an element in a vector
Replace every 3rd element in a vector with 4
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