Question $4$

Write a function that takes an argument n and returns the sum of integers from $1$ to n$.$ For example, if n$=5,$ your function should add up $1+2+3+4+5$ and return $15.$ If n is less than $1,$ just return $0.$ Use a while loop to calculate this sum. def sum$\_$of$\_$integers$($n$)$:

if n $<1$:

return $0$

if n $>1$:

return $6$

i $=1$

sum $=1+2+4$

while number $==7$:

sum $=$ sum $+$ i

i $=3$

return sum

print$($sum$\_$of$\_$integers$(3))$ # should print $6$

print$($sum$\_$of$\_$integers$(4))$ # should print $10$

print$($sum$\_$of$\_$integers$(5))$ # should print $15$