# Change for loop to while loop.

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Cha Rot on 24 Apr 2022
Answered: Dyuman Joshi on 24 Apr 2022
I need to convert this code from the for loop to while loop but when I tried to do so, it always comes out as error. Please help :(
n = input ("Input a number: ");
fprintf("\nOdd number: ");
for i = 1:2:n
fprintf("%d ",i);
end
fprintf("\nEven number: ");
for i = 2:2:n
fprintf("%d ",i);
end
fprintf("\nSum of Even numbers: ");
sum = 0;
for i = 2:2:n
sum = sum + i;
end
fprintf("%d",sum);
prod = 1;
fprintf("\nProduct of Odd numbers: ");
for i = 1:2:n
prod = prod*i;
end
fprintf("%d",prod);
DGM on 24 Apr 2022
Again:
fprintf('\nProduct of odd numbers: ')
x = 1;
odd_product = 1; % need to initialize to something nonzero
while x <= n % less than or equal to
odd_product = odd_product * x;
fprintf(' %d',odd_product) % not x
x = x+2; % increment x
end

Dyuman Joshi on 24 Apr 2022
%n = input ("Input an integer: ");
n=11;
fprintf('Odd numbers: ')
Odd numbers:
x=1;o=1;
while x<=n
fprintf(' %d',x)
o=o*x;
x=x+2;
end
1 3 5 7 9 11
fprintf('\nEven numbers:')
Even numbers:
y=0;e=0;
while y<=n
fprintf(' %d',y)
e=e+y;
y=y+2;
end
0 2 4 6 8 10
fprintf('\nSum of even numbers: %d', e)
Sum of even numbers: 30
fprintf('\nProduct of odd numbers: %d', o)
Product of odd numbers: 10395

DGM on 24 Apr 2022
If you want to make things more complicated, you can:
n = 5; %input ("Input a number: ");
fprintf("\nOdd number: ");
i = 1;
while i <= n
fprintf("%d ",i);
i = i+2;
end
% and so on