• Let's discuss python, not equal operators.  
•  In python, there are different types of operators available,in that we have not equal operators.
• Not equal to operator comes under the comparison operator as we compare the one variable with the other.
• Python not equal to the operator is used for the same data type values.
• When we compare one variable with another variable by using not equal operators we will get the boolean type values. bool type is True or False. if the values are not equal then it returns True value and if the values are equal then it returns the False value.
• The syntax for not equal to is !=  mostly used in the python 3 versions.
  

Python Not Equal Operator (!=) Explained with Examples

The not equal operator is one of the most commonly used comparison operators in Python. Whether you're comparing numbers, strings, or variables, understanding how != works is fundamental to writing clean conditional logic.

What Is the Not Equal Operator in Python?

In Python, the != operator checks whether two values are not equal to each other. It belongs to the family of comparison operators, and it always returns a boolean value — either True or False.

• If the two values are different, it returns True
• If the two values are same, it returns False
• Works with integers, floats, strings, lists, and more
• != is the standard syntax used in Python 3

Syntax

#1. write a python program to describe not equal to operator using integer

1. a=2.5
2. b=1.0
3. c=5.0
4. print(a!=b)
5. true
6. print(b!=c)
7. true
8. print(a!=b!=c)
9. true

#2. write a python program to describe not equal to an operator using string

• Python, not equal operator  using string

1. x='apple'
2. y='ball'
3. print(x!=y)

output: true

#1. Python Not Equal Operator with Float Numbers

Let's start with a simple example comparing float values using !=:

a = 2.5
b = 1.0
c = 5.0

print(a != b)       # True  — 2.5 and 1.0 are different
print(b != c)       # True  — 1.0 and 5.0 are different
print(a != b != c)  # True  — all three values are different

Output:

True
True
True

Notice that a != b != c is Python's way of chaining comparisons. It checks that a is not equal to b, AND b is not equal to c — both in a single expression.

#2. Python Not Equal Operator with Integers

Works exactly the same with whole numbers:

x = 10
y = 20

print(x != y)   # True  — 10 and 20 are different
print(x != 10)  # False — 10 and 10 are equal

Output:

True
False

#3. Python Not Equal Operator with Strings

String comparisons with != are case-sensitive. 'Apple' and 'apple' are treated as different values:

x = 'apple'
y = 'ball'

print(x != y)              # True  — different strings
print(x != 'apple')        # False — same string
print('Apple' != 'apple')  # True  — case-sensitive!

Output:

True
False
True

#4. Using Not Equal in an if Statement

The most practical use of != is inside if conditions to control program flow:

username = "admin"
input_user = "guest"

if input_user != username:
    print("Access denied. You are not the admin.")
else:
    print("Welcome, admin!")

Output:

Access denied. You are not the admin.

Quick Reference Table

Key Points to Remember

• != is the standard not equal operator in Python 3
• Always returns a boolean — True or False
• Works across all data types: int, float, string, list, tuple
• String comparisons are case-sensitive by default
• Can be chained: a != b != c checks multiple values at once

The != operator is simple but powerful. Once you get comfortable using it in if statements, loops, and filters, you'll find yourself reaching for it constantly in real-world Python code.

• In this  program we will discuss about how to check whether a character is vowel or consonant.
• In English language will be having 5 vowels and 21 consonants.
• To check entered character is vowel or consonant, first Read input character from user using scanf.
• There are only 5 vowels(A,E,I,O,U), so we need to check entered character is there in those 5 characters.
• If it is present then we can say its an vowel, otherwise it is a consonant.
• While checking we need to consider case sensitivity. So we need to check both uppercase vowels and lower case vowels.
• Lets see an example program to check whether entered character is vowel or not.

Write a program to determine whether the input character is a vowel or consonant or not an alphabet

• Lets discuss a program on how to print prime numbers from 1 to 100.
• Here by default we need to print all prime numbers from 1 to 100.
• No need to ask user to enter a number because we need to end loop at 100.
• Using for loop iterate from 1 to 100
• Take one more loop and check each number is divisible by 1 and itself or not.
• Program to print prime number between 1 to 100 in c

#1.C program to print prime numbers from 1 to 100

•  Check here for printing an integer in c 
• We have 4 basic data types in c programming language
• int, char, float and double
• For storing numbers or integers we will use int data type.
• Lets see an example program sum of two integers in c programming language.
• To add two integers we need two int type variables and third variable to store result of sum of two integers.
• Its a basic level example program for beginners to understand integer data types

• Please check this below program which prints even numbers from 1 to n.

• Print even numbers in c 
• To print sum of even numbers from 1 to n first we need to get all the even numbers and add them.
• Using for or while loop iterate from 1 to n number and get all even numbers
• sum=sum+evenNumber
• C program to find sum of even numbers using while loop

C program to find sum of even numbers using while loop

• Lets see how to write a c program to print even numbers using c programming.\
• Its a basic example to print only even numbers 
• Use for loop and iterate from 1 to n.
• In each iteration check if number if divisible by 2 (n%2 == 0). if yes then its a even number otherwise it is a odd number.
• C program to print even numbers from 1 to n. 

#2 print even numbers in c using while loop

• Now we will try to print even numbers using while loop
• Only difference is replace for with while loop
• Variable initialization will be done before loop
• condition will be inside while(condition)
• increment or decrement will be last line of while block 
• Lets print even numbers using while loop from 1 to n.