how to check if a string contains letters o number in python code example

Example 1: python how to check if string contains only numbers

print("012345".isdecimal())
OUTPUT
True
print("a12345".isdecimal())
OUTPUT
False

Example 2: check how many letters in a string python

#use the built in function len()

len("hello")

#or you can count the characters in a string variable

a = "word"
len(a)