How to return a double correctly?

[Terrance]

Here is the code:

#include <stdio.h>

main()
{
    int integer_var = 100;
    float floating_var = 331.79;
    double double_var = 8.44e+11;
    char char_var = 'W';

    printf("integer_var = %i\n", integer_var);
    printf("floating_var = %f\n", floating_var);
    printf("double_var = e\n", double_var);
    printf("char_var = %c\n", char_var);
    return 0;
}

And it returns:

integer_var = 100
floating_var = 331.790009
double_var = e
char_var = W

Why is the double not getting outputted correctly?

[Mario F.]

Look again at the string and try to notice what is missing that you haven't missed in all others.

[Terrance]

%, thanks