How to display the results of a for loop

I want to make a game of 21, that starts with the user getting two random cards and then printing out what they get, using a for loop keeps saying "Index exceeds the number of array elements(1)."

my code is

for i =1:2
   
    card = randi([0 10]);
if (card ==0)
    card = 'A'; %if the result is 0, rename it to A
end

end
fprintf("You have been given 2 cards, %d and %d" , card(i))

[Stephen23]

This defines a scalar numeric (an integer from 0 and 10, inclusive), which you name card:

card = randi([0 10])

Your code does not do anything that changes the size of card., or allocate/concatenate/etc it into any other variable. On each loop iteration you redefine card as a new scalar.

Then after the loop (whose last iteration defines i=2) you use this code:

card(i)

card only has one element (you defined it to be scalar), but you are trying to access its 2nd element. Thus the error.

Answer 1

[Urmila Rajpurohith]

As mentioned above the variable “card” is a scalar.

To display the results of for loop you can create a Null vector and append the card value to the vector and while printing the output you can print the vector.

result=[];
for i =1:2
   card = randi([0 10])
    if (card ==0)
    card = 'A'; %if the result is 0, rename it to A
    end
result=[result card];
end
fprintf("You have been given 2 cards, %d %d", result);

[GAGANDEEP KAUR SIDHU]

result=[];
for i =1:2
    card = randi([0 10])
    if (card ==0)
        card = 'A'; %if the result is 0, rename it to A
    end
    result=[result card];
end
fprintf("You have been given 2 cards, %d %d", result);

[Walter Roberson]

@GAGANDEEP KAUR SIDHU

Suppose 0 is randomly generated, and then (for example) 8. Then the sequence would go

result = []

result =

     []

card = 0    %assumption for testing

card = 0

card = 'A' %because of if test

card = 'A'

result = [result card]

result = 'A'

card =  8   %assumption for testing

card = 8

result = [result card]

result = ''

Where is the output ?

fprintf("You have been given 2 cards, %d %d", result);

You have been given 2 cards, 65 8

Okay, I see the 8 there, but what is the 65 ?