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Python: Print the index of the character in a string

Python String: Exercise-44 with Solution

Write a Python program to print the index of the character in a string.

Python String Exercises: Print the index of the character in a string

Sample Solution:-

Python Code:

str1 = "w3resource"
for index, char in enumerate(str1):
    print("Current character", char, "position at", index )

Sample Output:

Current character w position at 0                                                                             
Current character 3 position at 1                                                                             
Current character r position at 2                                                                             
Current character e position at 3                                                                             
Current character s position at 4                                                                             
Current character o position at 5                                                                             
Current character u position at 6                                                                             
Current character r position at 7                                                                             
Current character c position at 8                                                                             
Current character e position at 9 

Flowchart:

Flowchart: Print the index of the character in a string

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Python Code Editor:

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Python: Tips of the Day

Check if a given key already exists in a dictionary:

In is the intended way to test for the existence of a key in a dict.

d = {"key1": 10, "key2": 23}

if "key1" in d:
    print("this will execute")

if "nonexistent key" in d:
    print("this will not")

If you wanted a default, you can always use dict.get():

d = dict()

for i in range(100):
    key = i % 10
    d[key] = d.get(key, 0) + 1

and if you wanted to always ensure a default value for any key you can either use dict.setdefault() repeatedly or defaultdict from the collections module, like so:

from collections import defaultdict

d = defaultdict(int)

for i in range(100):
    d[i % 10] += 1

but in general, the in keyword is the best way to do it.

Ref: https://bit.ly/2XPMRyz