﻿ Python: Print the following integers with zeros on the left of specified width - w3resource

# Python: Print the following integers with zeros on the left of specified width

## Python String: Exercise-33 with Solution

Write a Python program to print the following integers with zeros on the left of specified width.

Sample Solution:-

Python Code:

x = 3
y = 123
print("\nOriginal Number: ", x)
print("Formatted Number(left padding, width 2): "+"{:0>2d}".format(x));
print("Original Number: ", y)
print("Formatted Number(left padding, width 6): "+"{:0>6d}".format(y));
print()

Sample Output:

Original Number:  3
Formatted Number(left padding, width 2): 03
Original Number:  123
Formatted Number(left padding, width 6): 000123

Flowchart:

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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