Loop
While
#!/usr/bin/python

n = 10;
while n > 0:
    print n;
    n = n-1;
else:
    print "End of Loop ...";
		
For
#!/usr/bin/python

l = [1, 2, 3, 4];

#list elements and id
for i in l:
    print i, id(i);

for i in l:
    i = i*10; #i is immutable
    print i, id(i);

print l;#[1, 2, 3, 4]

for index, ele in enumerate(l):
    l[index] = l[index]*10;
    print index, l[index], id(l[index]), ele, id(ele);

print l;#[10, 20, 30, 40]
		
Break
#!/usr/bin/python

for i in range(10):
    if i == 5:
        break;
    print i;
		
Continue
#!/usr/bin/python

for i in range(10):
    if i%2 == 0:
        continue;
    print i;
		
Pass
#!/usr/bin/python

for i in range(10):
    if i%2 == 0:
        pass; # do nothing
    else:
        print i;
		
Reference