Function explanation in this part of the c code? a little confusion

so this is the structure of the code that parse out a floppy disk, the outoutput should be like this:

flop: structure
                number of FAT:              2
                number of sectors used by FAT:      9
                number of sectors per cluster:      1
                number of ROOT Entries:       224
                number of bytes per sector:   512
                ---Sector #---     ---Sector Types---
                      0                  BOOT       
                   01 -- 09              FAT1         
                   10 -- 18              FAT2         
                   19 -- 32              ROOT DIRECTORY

The numbers should be numbers should be extracted from the disk rather than hard coded.

Here is the part of the code:

void structure(int l) {
printf("        number of FAT:                      %d\n", disk.NUMBER_OF_FATS);
printf("        number of sectors used by FAT:      %d\n", disk.SECTORS_PER_FAT);
printf("        number of sectors per cluster:      %d\n", disk.SECTORS_PER_CLUSTER);
printf("        number of ROOT Entries:             %d\n", disk.MAX_ROOT_DIRS);
printf("        number of bytes per sector          %d\n", disk.BYTES_PER_SECTOR);
if (l) {
printf("        ---Sector #---      ---Sector Types---\n");
printf("             0                    BOOT\n");

for(int i = 0; i < disk.NUMBER_OF_FATS; i++)
    printf("          %02d -- %02d                FAT%d\n", (disk.SECTORS_PER_FAT * i) + 1, disk.SECTORS_PER_FAT * (i + 1), i);

printf("          %02d -- %02d                ROOT DIRECTORY\n", disk.SECTORS_PER_FAT * disk.NUMBER_OF_FATS, (disk.MAX_ROOT_DIRS / 16) + (disk.SECTORS_PER_FAT * disk.NUMBER_OF_FATS));
}
}

My questions are 1. What are int l stand for? is it just a variable in if function? 2. Also can you some just give me a brief explation of the for(int i = 0; i < disk.NUMBER_OF_FATS; i++) part of the function? does it mean that if I is smaller than number of fats it will go into FAT1, then rest go to fat2?

Please feel free to comment or explain the code, thank you!