Question

Wrte a for loop to compute the sum 1 + 2 + 3 + 4 Multiple answers.
Answer
A
int sum =0;
for (int j = 0 ; j < 4 ; j++)
sum=sum+j;
B
int sum =0;
for (int j = 1; j < 5 ; j++)
sum=sum+j;
C
int sum =0;
for (int j = 1 ; j < 6 ; j++)
sum=sum+j;
D
int sum =0;
for (int j = 1 ; j <= 4 ; j++)
sum += j;

Answer 1

B

Answer 2

sum = 0 outside loop.
( initial value j=1; ending condition j<5; increment by 1 each round of lopp j++)
sum = sum + j.
so on round 1 sum=0+ 1 = 1
so on round 2 j= 2 not 1.
so sum = 1 + 2 =3 (not 2 as is in the series needed) Is that a problem denyekwe?

Answer 3

d

Answer 4

B and D work

Answer 5

@arcticf0x why would you think D is wrong? it iterates 4 times because <=

Answer 6

Uh oh, overlooked, D is correct aswell. @Tomas.A

Answer 7

So B and D.