Rewrite following code fragment using while loops :

for i in range(1, 16) :
  if i % 3 == 0 :      
     print (i)

Rewrite following code fragment using while loops :

for i in range(4) :
    for j in range(5):
        if i + 1 == j or j + 1 == 4 :
           print ("+", end = ' ')
    else :
        print ("o", end = ' ')
print()

Predict the output of the following code fragments:

x = 10
y = 0
while x > y: 
   print (x, y)
   x = x - 1
   y = y + 1

Predict the output of the following code fragments:

keepgoing = True        
x=100                   
while keepgoing :       
    print (x)
    x = x - 10 
    if x < 50 :
       keepgoing = False