arithmetic operators code snippets in matlab

how to count from -1 to 101 in matlab

while loop adjust uservalue while uservalue is less than 0 or greater than 80. if uservalue is greater than 80, then subtract 5 from uservalue. if uservalue is less than 0, then add 10 to uservalue in matlab

write a for loop that doubles the elements that are positive and are divisible by 3 or 5, and raises to the power of 3 the elements that are negative, but greater than -5 in matlab in matlab