Very very basic: How to display one character in a string?

It's been about two years since I last program c, now I need to do it for a basic project. How would I print out one letter in a string?

For example lets say I have a string called str=[Hello]. I want to display the third letter so just the "l".

Here's what I have so far

Code:

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#include<stdio.h>
int main()
{
    char str[50] = "Hello";
    printf("The third letter is : %s \n",str[3]);
    return 0;
}

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I solved it by using "%c" instead of "%s" stupid me.

Code:

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printf("The third letter is : %s \n",str[3]);

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This will print the fourth letter (after changing %s to %c of course). Remember array indexing starts at 0.

Bye, Andreas