Python Ninja Bootcamp 17-for loop

Learn Python like a Professional! Take You from 0 to Hero

In this Python lecture, we will learn about the for loop.

"for loop in Python is used to iterate over a sequence (list, tuple, string) or other iterable objects. Loop continues until we reach the last item in the objects".

Let's see some example-

Create for loop

for & list

l=[1,2,3,4,5] 

print(l)

>> [1,2,3,4,5]

# Display all the elements in the list l

for var in l:
    print(var)

>>  1
      2
      3
      4
      5

# Display all the elements even in the list l

for var in l:    

   if var%2 == 0:
        print(var)

>> 2
     4

# Display all the elements odd in the list l

for var in l:    

   if var%2 != 0:
        print(var)

>> 1
     3
     5

# Display sum all the elements in the list l

sum=0

for var in l:

    sum += var

print(sum)

>> 15


for & string

s= 'Hello World' 

print(s)

>> 'Hello World'

# Display all the elements in the string one by one

for var in s:

    print(var)

>> H
      e
      l
      l
     o

     W
      o
      r
      l
     d


for & tuple

t=(1,2,3,'four',five)

print(t)

>> (1,2,3,'four','five')

# Display all the elements in the tuple one by one

for var in s:

    print(var)

>> 1
     2
     3
     'four'
     'five'


for & Dictionary

d={'k1':1,'k2':2,'k3':3}

print(d)

>> { 'k1':1,'k2':2,'k3':3 }

# Display all the keys in the dictionary one by one

for var in d:

    print(var)

>> k1
     k2
     k3

# Display all the key-value pairs in the dictionary one by one

for key,val in d:

    print(key)

    print(val)

>> k1
     1
     k2
     2
     k3
     3

EDITS ARE WELCOMED!!

In the next Blog, we will discuss while loop 

https://sngurukuls247.blogspot.com/2018/09/python-ninja-bootcamp-18-while-break.html

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