MATLAB: How to prompt the user to enter a non-negative integer m

programming

how to prompt the user to enter a non-negative integer m

>> m = input ('Enter a non-negative integer: '); 
>> m2 = abs(m);
>> m3 = round(m2)

As shown above, I can only write them separatly. Is there a way to include all three commands in one?

m3 = round(abs(input('Enter a non-negative integer: ')))

n = input('Enter in a positive integer: ')
while n<0 | numel(n)>1 | fix(n)~=n
  n = input('Enter in a positive integer: ')
end

The while loop will continually ask for a non-zero even integer until one is entered.

prompt= 'enter non zero even integer '
z = 0;
while z=0 || mod(z,2)~=0
    z= input(prompt)
end

If you'd like to avoid negative numbers, too,

while z<=0 || mod(z,2)~=0