for i in range(0,5,1):
    print('i',i)
for j in range(10,5,-1):
    print ('j',j)
for i in range(5):
    print ('1',i)
    
a=[1,2,3,4,5,6,'x',10,11,12,13]
print('a1:',a[::-1])
print("a2:", a[-2:-4:-1])
print('a3:',a[:-2:1], a[:-5:-1])
print('a4:', a[-1:2:-1], a[1:-2:1], a[-3:0:-1])
print('a5:',a[5:2:-1])
b=('hello world')
print(b[-3:0:-1], b[1:-2:1])
x= -9
y='hello'
if tuple():
    print('x is larger then 0')
elif x==0:
    print('x is 0')
elif x < 1:
    if x< -10:
        print ('x is less then -10')
    print('x less then 1')
else:
    print('x is less then 0')
if y!='hello ':
    print('y is not number')
if print('y is something'):
    print('SSSSSS')
elif x== 1:
    pass
else:
    print('zzzzzzz')
print('this line is out of if block')    
x=1
while x<10:
    print(x)
    x+=1 #x=x+1
    break
print('end of while loop') 
print(x)
a='aklfknkzxfa'
for x in a:
    if x=='f': 
        y=+1
        print(y)
   # print(x)
for i in range(5):
    print(i)
    if i==3:print('i is equal to 3')
    i=6
    print ('',i)
for y in range(10):
    for x in range(5,0,-1):
       # print(y,x)
        if x==3:
            continue
        print(y,x)
    break
    continue