C Foundation

What is C? C Compiler Installation C Extensions C Compiler C Interpreter C Program Structure

C Basics

C Keywords C Data Types C Identifiers C Variables C Constant C Escape Sequences C Constant and Volatile C Typecast

Operators

What is Operator C Comma Operator C Arithmetic Operators C Relational Operators C Logical Operators C Bitwise Operators C Conditional Operators C : : Operator C Operator Priority

Basic IO's

Basic IO's C Formatted Functions C Unformatted Functions C Common Functions

Control Statements

What is Control Statement C if Statement C if else Statement C Nested if Statement C Else if Statement C Break Statement C Continue Statement C Switch Statement C Goto Statement

Looping

What is Control Loop C for Loop C Nested for Loop C while Loop C Nested while Loop C do while Loop C Nested do while loop

Functions

What is Function C User Defined Functions C Recursion C Passing Parameters

Scope

Scope C Local Scope C Global Scope

Storage Classes

What is Storage Class C Auto C Extern C Static C Register

Array

What is Array C One Dimensional Array C Two Dimensional Array C Multi Dimensional Array C Arrays Of Strings

String

What is String C String Functions

Pointer

What is Pointer C Pointers Arithmetic C Pointer to Pointer C Pointers and Arrays C Pointers and Strings C Pointer to Functions Void Pointers Null Pointers C Null and Void Pointer

Structure

What is Structure C Struct within Struct C Array within Structure C Pointer to Structure C Structure and Function C Enum C Bitfield Structure C Type def

Union

What is Union

Files

What is File C read a file C write a file C File Handling C Error Handling C Low Level Disk I/O C Other file functions

Memory Allocation

What is Memory Allocation C Malloc() C Calloc() C Free() C Realloc() C Coreleft()

C Reference

All ASCII Code Basic C Questions

C Interview

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The ones who are crazy enough to think they can change the world are the ones who do.
- Steve Jobs

C Relational Operators

What Is Relational Operator?

  • Relational operators are used to compare arithmetic, logical and character expressions.
  • If the condition is "true" it returns 1, otherwise, it returns 0.
Relational Operators in C

Relational operator Types

C Programming provides 6 relational operators for comparing numeric quantities.

Operator Description Example Return Value
> Greater than 5 > 3 1
< Less than 5 < 3 0
<= Less than equal to 5 <= 5 1
>= Greater than equal to 6 >= 5 1
== Equal to 5 == 3 0
!= Not equal to 3 != 3 0

Relational Operator Program

Let us write a C program to demonstrate

relationaloperators.c
#include <stdio.h>
int main()
{
printf("\nCond.\t Return"); //Cond. stands for Condition
printf("\n5 > 3  :\t %d",5 > 3);
printf("\n5 < 3  :\t %d",5 < 3);
printf("\n5 <= 5 :\t %d",5 >=5);
printf("\n6 >= 5 :\t %d",6 >=5);
printf("\n5 == 3 :\t %d",5 == 3);
printf("\n3 != 3 :\t %d",3 != 3);
return 0;
}
  • Cond.     Return
  • 5 > 3   :      1
  • 5 < 3   :      0
  • 5 <= 5 :      1
  • 6 >= 5 :      1
  • 5 == 3 :      0
  • 3 != 3  :      0

Note:

Here true condition returns 1 and false condition returns 0.

Relational Operator In Conditional Statement

relationaloperators.c
#include <stdio.h>
int main()
{
int a = 5;
int b = 10;
if(a < b)
printf("a is the smallest number");
else
printf("b is the smallest number");
return 0;
}
  • a is the smallest number

Note:

Here less than conditional operator is used to check whether a is smaller than b

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