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Python String isdigit () and its application

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Syntax :

  string.isdigit ()   Parameters:  isdigit () does not take any parameters  Returns:  1.True- If all characters in the string are digits. 2.False- If the string contains 1 or more non-digits. 

Examples:

 Input: string = ’15460’ Output: True Input: string =’ 154ayush60’ Output: False 

# Python code to implement isdigit ()

 
# digit check

string = ’15460 ’

print (string.isdigit ())

 

 

string = ’154ayush60’

print (string.isdigit ())

 

Output:

 True False 

Errors and Exceptions

  1. It takes no arguments, so it returns an error if a parameter is passed
  2. Top subscripts and subscripts are considered digits as well as decimal, so isdigit () returns "True".
  3. Roman numerals, numerals and fractions are not considered digits. Therefore, isdigit () returns "False"

Usage: Using ascii character values, count and print all digits using the isdigit () function.

Algorithm
1. Initialize a new line and the variable count = 0.
1. Step over each character using the ascii value, check if the character is a digit. 
2. If it is a number, increment the counter by 1 and add it on a new line, otherwise skip to the next character. 
3. Print the counter value and a new line.

# Python program for illustration
# applying isdigit ()
# initializing a blank line

newstring = ’’

 

 
# Initialize counters to 0

count = 0

 
# Increase the counter if a digit is found
# and add a digit to the new line
# Finally print invoice and new line

 

for a in range ( 53 ):

  b = chr (a)

if b.isdigit () = = True :

count + = 1

newstring + = b

 

print ( "Total digits in range:" , count)

print ( "Digits:" , newstring)

Output:

 Total digits in range: 5 Digits: 01234 

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