For loops and some exercises

For loops are used for sequential traversal. For example: traversing a list or string or array etc. In Python, there is no C style for loop, i.e., for (i=0; i<n; i++). There is “for in” loop which is similar to for each loop in other languages.

for var in iterable

# statements 

In Python, iterable means an object can be used in iteration. 

Cities = ["London ", "Leeds ", "Birmingham "]

for x in fruits:

  print(x) 

Out put 

London 

Leeds

Birmingham 

The range() Function For example, if you wanted to iterate through the values from 0 to 4, you could simply do this 

for x in range(4):

  print(x) 

Out put 
0
1
2
3
4




Using the start parameter:
for x in range(2, 6):
 print(x)


Out put
2
3
4
5
6


The  range()  function defaults to increment the sequence by 1, however it is possible to specify the increment value by adding a third parameter: range(2,10,3)
for x in range(2,10,3):
  print(x)
Out put

2

5

8

for x in range(6):
  print(x)
else:
  print("Welcome to python world!")


Out put
Welcome to python world!
Nested for loop

num= ["1", "2"]
fruits = ["apple", "banana"]

for x in num:
  for y in fruits:
    print(x, y)

out put

1 apple

1 banana

2 apple

2 banana