12 - String Slicing

String Slicing & Operations on String

Length of a String

We can find the length of a string using len() function.

Example:

fruit = "Mango"
len1 = len(fruit)
print("Mango is a", len1, "letter word.")

# Output:
Mango is a 5 letter word.

String as an array

A string is essentially a sequence of characters also called an array. Thus we can access the elements of this array.

Example:

pie = "ApplePie"
print(pie[:5])      #Slicing from Start
print(pie[5:])      #Slicing till End
print(pie[2:6])     #Slicing in between
print(pie[-8:])     #Slicing using negative index

## Output:
Apple
Pie
pleP
ApplePie
Note

This method of specifying the start and end index to specify a part of a string is called slicing.

  • There's another shorter method to slice a string:
def from_string(string):
	name, age = string.split('-')
	return (name, int(age)) 
	
# This is shorter version of:
def from_string(string):
    name = string.split('-')[0]
    age = string.split('-')[1]
    return (name, int(age)) 

print(from_string("goofle-12"))


# output:
('goofle', 12)

Loop through a String:

Strings are arrays and arrays are iterable. Thus we can loop through strings.

Example:

alphabets = "ABCDE"
for i in alphabets:
    print(i)

# Output :
A
B
C
D
E

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