Python Check if Continuous Series of Numbers
In this Python tutorial, we will discuss Python Check if a variable is a number and also cover the below points:
- How to check if a variable is an integer in Python
- Check if variable is not a number in Python
- Python check if variable is number or string
- How to check if a variable is number or array in Python
- Python check if variable is number or list
- Check if variable is whole number in Python
- Python check if variable is real number
- How to check if variable contains a number in Python
- Python check if variable is between two numbers
Python variable is like a memory location where to store a value. To declare a variable we just have to assign a value to it. You don't have to give any additional commands unlike any other programming languages like C, C++, Java where you have to give an additional command for declaration and assigning purpose.
Python Check if a variable is a number
- In this section, we will learn how to check if a variable is a number in Python.
- We can use a method to check if a variable is a number is using a try-except block. In the try block, we can use the given variable to an int or float.
Syntax:
Here is the syntax of try-except block
try: print() except: print() Example
Let's take an example to check if a variable is a number
Variable = "JOHN" try: a = int(Variable) print('The variable a number') except: print('The variable is not a number') Here is the screenshot of following given code
Read: Python NumPy append + 9 Examples
How to check if a variable is an integer in Python
Suppose you have a couple of variables in a program A and B. A has an integer value while B has a decimal value so how will you check whether a is an integer or not and if b is also an integer or not.
- In this section, we will learn how to check if a variable is an integer in Python.
- Now the methods that we are going to use to check if the variable is an integer or not.
- Isinstance method()
- Try-except method()
- Round method()
Isinstance method() is a built-in method in python which returns true when the specified object is an instance of the specified type otherwise it will return false.
Syntax:
isinstance (var,int) Example
Let's take an example to check if a variabe is an integer.
b = 3 c = 3.4 print(isinstance (b,int)) print(isinstance (c,int)) Here is the screenshot of following given code
- In the Try-except block, we can use the given variable to an int or float.
- we can use a method to check if a variable is an integer is using a try-except block.
Syntax:
Here is the syntax of try-except block
try: print() except: print() Example
Let's take an example to check if a variable is an integer.
Variable = 3 try: a = int(Variable) print('Variable is integer') except: print('variable is not an integer') Here is the Screenshot of following given code
Round method in Python returns the nearest integer when no values are passed to the optional digit argument.
Syntax:
Here is the syntax of Round method
round(number,number of digits) Example
Let's take an example to check if a variable is an integer
def is_int(value): if value == round(value): print("True") else: print("False") c=4 d=4.5 is_int(c) is_int(d) Here is the screenshot of following given code
Read: How to create a variable in python
Python check if a variable is not a number
- In this section, we will learn how to check if a variable is not a number in Python.
- we can use a try-except method to check if a variable is not a number is using a try-except block. In the try block, we can use the given variable to an int or float.
Syntax:
Here is the syntax of try-except block
try: print() except: print() Example
Let's take an example to check if a variable is not a number
Variable = "Micheal" try: a = int(Variable) print('Variable is a number') except: print('variable is not a number') Here is the screenshot of following given code
Python check if variable is number or string
- In this section, we will learn how to check if a variable is a number or string in Python.
- We can easily use an isinstance method to check if a variable is a number or string is using an isinstance() method.
- Isinstance method() is a built-in method in python which returns true when the specified object is an instance of the specified type otherwise it will return false.
Syntax:
isinstance (var,int) Example
Let's take an example to check if a variable is number or string
Variable = "Micheal" try: a = int(Variable) print('The variable a number') except: print(' variable is string') print(isinstance (Variable,str)) Here is the Screenshot of following given code
This is how to check if variable is number or string in Python.
Read: How to split a string using regex in python
Python check if variable is number or array
- In this section, we will learn how to check if a variable is a number or array in Python.
- we can use a try-except method to check if a variable is a number or array is using a try-except block. In the try block, we can use the given variable to an int or float.
Syntax:
Here is the syntax of try-except block
try: print() except: print() Example
Let's take an example to check if a variable is a number or array
import numpy as np Variable = ([1,2,3]) try: a = int(Variable) print(' variable is number') except: print(' variable is array') Here is the Screenshot of following given code
This is how to check if variable is number or array in Python.
Read Python Dictionary update with examples
Python check if variable is number or list
- In this section, we will learn how to check if a variable is a number or a list in Python.
- we can use a try-except method to check if a variable is a number or a list is using a try-except block. In the try block, we can use the given variable to an int or float.
Syntax:
Here is the syntax of try-except block
Example
Let's take an example to check if a variable is a number or list
Var = [1,2,3,4,"John"] try: a = int(Var) print(' variable is number') except: print(' variable is a list') Here is the Screenshot of following given code
This is how to check if variable is number or list in Python.
Read: Check if a list is empty in Python
Python check if a variable is a whole number
- In this section, we will learn how to check if a variable is a whole number in Python.
- Now the methods that we are going to use to check if the variable is a whole number.
- int() method
- try-except method
int() function is a built up function that will convert any string or float to into a integer form.
Syntax:
Here is the syntax of int() method
int(String,base) Example
Let's take an example to check if variable is whole number.
y = 3.2 print(y - int(y) == 0) # true if y is a whole number # false if it is decimal number Here is the Screenshot of following given code.
- Now another method is the Try-except block, we can use the given variable to an int or float.
- we can use this method to check if a variable is a whole number by using a try-except block.
Syntax:
Here is the syntax of try-except block
try: print() except: print() Example
Let's take an example to check if variable is whole number.
Var = 4 try: a = int(Var) print(' variable is whole number') except: print(' variable is not a whole number') Here is the screenshot of following given code.
Python check if variable is real number
- Any number that can be plotted on a number line is called a real number in Python.
- In this section, we will learn how to check if a variable is a real number or not.
- we can use a try-except method to check if a variable is a number or a list is using a try-except block. In the try block, we can use the given variable to an int or float.
Syntax:
try: print() except: print() Example
Let's take an example to check if variable is real number or not.
Var = 4.333 try: a = int(Var) print(' variable is a real number') except: print(' variable is not a whole number') Here is the Screenshot of following given code.
This is how to check if variable is real number in Python.
Read: How to convert list to string in Python
Python check if variable is between two numbers
- In this section, we will learn how to check if a variable is between two numbers in Python.
- Create a range of integers from start to end. Use keyword integers to check if a variable is between two numbers.
Syntax:
range(start,stop) Example
Let's take an example to check if variable is between two numbers.
Var = 9 is_between = 9 in range(6, 18) #Check if 9 lies between 6 and 18 print(is_between) Here is the Screenshot of following given code.
This is how to check if variable is between two numbers in Python.
You may like the following Python tutorials:
- Check if NumPy Array is Empty in Python
- Python remove substring from a String
- Python Tkinter Text Box Widget
- Python 3 string replace() method
- Python compare strings
- Python 3 string methods with examples
In this Python tutorial, we learned how to check if a variable is a number in Python and the below examples:
- Python Check if a variable is a number
- Python check if a variable is an integer
- Python check if a variable is not a number
- Python check if a variable is number or string
- Python check if a variable is number or array
- Python check if a variable is number or list
- Python check if a variable is whole number
- Python check if a variable is real number
- Python check if a variable is between two numbers
Python is one of the most popular languages in the United States of America. I have been working with Python for a long time and I have expertise in working with various libraries on Tkinter, Pandas, NumPy, Turtle, Django, Matplotlib, Tensorflow, Scipy, Scikit-Learn, etc… I have experience in working with various clients in countries like United States, Canada, United Kingdom, Australia, New Zealand, etc. Check out my profile.
Source: https://pythonguides.com/python-check-if-a-variable-is-a-number/
0 Response to "Python Check if Continuous Series of Numbers"
Post a Comment