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Measure the Elapsed Time in Python Represent enum Create a Countdown Timer Convert Bytes to a String

Introduction

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Python Program to Count the Number of Digits Present In a Number

To understand this example, you should have the knowledge of the following Python programming topics:

Example 1: Count Number of Digits in an Integer using while loop


              
num = 3452
count = 0

while num != 0:
    num //= 10
    count += 1

print("Number of digits: " + str(count))

Output


              
Number of digits: 4

In this program, the while loop is iterated until the test expression num != 0 is evaluated to 0 (false).

After the first iteration, num will be divided by 10 and its value will be 345. Then, the count is incremented to 1.
After the second iteration, the value of num will be 34 and the count is incremented to 2.
After the third iteration, the value of num will be 3 and the count is incremented to 3.
After the fourth iteration, the value of num will be 0 and the count is incremented to 4.
Then the test expression is evaluated to false and the loop terminates.

Example 2: Using inbuilt methods


              
num = 123456
print(len(str(num)))

Output

In the above example, we first convert the integer value into string by using str(). Then, we find the length of the string using len().

Also Read:

Python Program to Count the Number of Occurrence of a Character in String