Question

Can someone please explain this

1. Determine the output

a = 3

b = 4

c = 10

While a < c

      a = a + 2

      b = b * 2

Endwhile

Output a, b, c

2. Determine the output

k = 4

m = 0

n = 7

While j < k

m = 5

While m < n

Ouput “X”

m = m + 1

Endwhile

j = j + 1

Endwhile

Output j, k, m, n

Answer 1

1) final output values of a, b, c will be:

a=11

b=64

c=10

Here the while loop starts with initial values as a=3, b=4 and c=10

Since (a<c) i.e 3<10 the loop executes as follows

a=a+2 (3+2)

b=b*2 (4*2)

after first iteration, a=5 and b=8

Since (a<c) i.e 5<10, second iteration begins:

a=a+2 (5+2)

b=b*2 (8*2)

after second iteration, a=7, b=16

since (a<c) i.e 7<10, third iteration begins:

a=a+2 (7+2)

b=b*2 (16*2)

after third iteration, a=9,b=32

Since (a<c) i.e 9<10, fourth iteration begins:

a=a+2 (9+2)

b=b*2 (32*2)

after fourth iteration, a=11, b=64

Now, since (a<c) evaluates to false I.e 11 is not less then 10, the loop stops.

Hence giving the final values as:

a=11

b=64

c=10