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# String validators Hacker Rank Solution – Queslers

## Problem: String validators Hacker Rank Solution

Python has built-in string validation methods for basic data. It can check if a string is composed of alphabetical characters, alphanumeric characters, digits, etc.

str.isalnum()
This method checks if all the characters of a string are alphanumeric (a-z, A-Z and 0-9).

``````>>> print 'ab123'.isalnum()
True
>>> print 'ab123#'.isalnum()
False``````

str.isalpha()
This method checks if all the characters of a string are alphabetical (a-z and A-Z).

``````>>> print 'abcD'.isalpha()
True
>>> print 'abcd1'.isalpha()
False``````

str.isdigit()
This method checks if all the characters of a string are digits (0-9).

``````>>> print '1234'.isdigit()
True
>>> print '123edsd'.isdigit()
False``````

str.islower()
This method checks if all the characters of a string are lowercase characters (a-z).

``````>>> print 'abcd123#'.islower()
True
>>> print 'Abcd123#'.islower()
False``````

str.isupper()
This method checks if all the characters of a string are uppercase characters (A-Z).

``````>>> print 'ABCD123#'.isupper()
True
>>> print 'Abcd123#'.isupper()
False``````

You are given a string S. Your task is to find out if the string  contains: alphanumeric characters, alphabetical characters, digits, lowercase and uppercase characters.

#### Input Format

A single line containing a string .

#### Output Format

In the first line, print `True` if  has any alphanumeric characters. Otherwise, print `False`.

In the second line, print `True` if  has any alphabetical characters. Otherwise, print `False`.

In the third line, print `True` if  has any digits. Otherwise, print `False`.

In the fourth line, print `True` if  has any lowercase characters. Otherwise, print `False`.

In the fifth line, print `True` if  has any uppercase characters. Otherwise, print `False`.

`qA2`

```True
True
True
True
True```

### String validators Hacker Rank Solution in Python 2

```S = raw_input()
print True if any(k in "0123456789" or k.lower() in "abcdefghijklmnopqrstuvwxyz" for k in S) else False
print True if any(k.lower() in "abcdefghijklmnopqrstuvwxyz" for k in S) else False
print True if any(k in "0123456789" for k in S) else False
print True if any(k in "abcdefghijklmnopqrstuvwxyz" for k in S) else False
print True if any(k in "ABCDEFGHIJKLMNOPQRSTUVWXYZ" for k in S) else False```

### String validators Hacker Rank Solution in Python 3

```if __name__ == '__main__':
s = input()
print(any(a.isalnum() for a in s) )
print(any(a.isalpha() for a in s) )
print(any(a.isdigit() for a in s) )
print(any(a.islower() for a in s) )
print(any(a.isupper() for a in s) )```

#### String validators Hacker Rank Solution in pypy

```# Enter your code here. Read input from STDIN. Print output to STDOUT
S=raw_input()
a=0
for i in range(len(S)):
if S[i].isalnum():
a+=1
if a>0:
print 'True'
else:
print 'False'

a=0
for i in range(len(S)):
if S[i].isalpha():
a+=1
if a>0:
print 'True'
else:
print 'False'

a=0
for i in range(len(S)):
if S[i].isdigit():
a+=1
if a>0:
print 'True'
else:
print 'False'

a=0
for i in range(len(S)):
if S[i].islower():
a+=1
if a>0:
print 'True'
else:
print 'False'

a=0
for i in range(len(S)):
if S[i].isupper():
a+=1
if a>0:
print 'True'
else:
print 'False'```

### String validators Hacker Rank Solution in pypy3

```if __name__ == '__main__':
s = input()
print(any(c.isalnum() for c in s))
print(any(c.isalpha() for c in s))
print(any(c.isdigit() for c in s))
print(any(c.islower() for c in s))
print(any(c.isupper() for c in s))```
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