You can use Python’s built-in functions and methods to check if a string represents an integer or a float. Here’s how you can do it:
Here’s the syntax for checking if a string represents an integer or a float in Python:
Check if the string represents an integer:
def is_integer(s):
try:
int(s)
return True
except ValueError:
return False
Example:
def is_integer(s):
try:
int(s)
return True
except ValueError:
return False
# Example usage:
print(is_integer("123")) # Output: True
print(is_integer("3.14")) # Output: False
print(is_integer("abc")) # Output: False
Check if the string represents a float:
def is_float(s):
try:
float(s)
return True
except ValueError:
return False
Example:
def is_float(s):
try:
float(s)
return True
except ValueError:
return False
# Example usage:
print(is_float("3.14")) # Output: True
print(is_float("123")) # Output: False
print(is_float("abc")) # Output: False
These functions use try-except blocks to attempt to convert the input string to an integer or a float, respectively. If the conversion succeeds, the function returns True, indicating that the input is a valid integer or float. If the conversion raises a ValueError, it means the input is not a valid integer or float, and the function returns False.
Python checks if the string is an integer or float example
Let’s see an example to check if a string represents an integer or a float using the functions we defined earlier.
def is_integer(s):
try:
int(s)
return True
except ValueError:
return False
def is_float(s):
try:
float(s)
return True
except ValueError:
return False
# Example usage:
str1 = "123"
str2 = "3.14"
str3 = "abc"
print(f"{str1} is an integer: {is_integer(str1)}")
print(f"{str2} is an integer: {is_integer(str2)}")
print(f"{str3} is an integer: {is_integer(str3)}")
print(f"{str1} is a float: {is_float(str1)}")
print(f"{str2} is a float: {is_float(str2)}")
print(f"{str3} is a float: {is_float(str3)}")
Output:
In the example above, we call the is_integer and is_float functions with different input strings to check if they represent an integer or a float, respectively. The functions return True if the input is a valid integer or float and False otherwise.
Note: IDE: PyCharm 2021.3.3 (Community Edition)
Windows 10
Python 3.10.1
All Python Examples are in Python 3, so Maybe its different from python 2 or upgraded versions.