# While loop

x=5

while(x>0): # can also be "while x>0: "

print(x)

x-=1

print()

#for loop

l = [[3,7,9],1,2,3,4,5,6]

for x in l: #iterate in arr using x as iterator

print(x,id(x)) #similar for string, each iterator points to -> char

print(id(l[0])) #above x was referring to same element not a copy

print()

#range function

for i in range(1,3): #from 1 to 3(not included)

print(i)

print()

for i in range(4): #no start vlue given so from 0 to 10

print(i)

# range(start, end, step_size)

# by default start=0 , step_size = 1 *end -> not included)

print()

#Continue and Break

#continue -> goes to next iteration skipping remaining code of current iteration

#break -> terminate iteration (current loop) completely t the instant it is encountered

for i in range(1,10):

print(i)

if(i==2):

continue

if(i==2 or i==4):

break

print("b")

# **** for loop and while loops have generally same speeds but python has optimized for loops

# so in **Python** for loop is faster

#tuples