int x = 3;
int y = 4;
void main(void)
{
   printf("%d\n", x+y);
}

Hints:

• the number stored in $v0 determines what kind of system call it is
• syscall 1 prints the number located in register $a0
• syscall 4 prints a string, whose address is located in $a0
• .word allocates 4 bytes in memory and initialises it
• you will need to load two values into registers to do the addition