Difference between %d and %i format specifier in C language

Hello, readers welcome to new post. Today we will discuss Difference between %d and %i format specifiers in C language. In C language of programming %d and %i are called formate specifiers. %d was used to specify the variable type as decimal and %i used for integer specification.

Note: %d is used to specify signed decimal integers and %i specifies integer

In a simple way there is no difference for print() function output but printing in numbers through use of %d or %i  but for use of scanf function differences exist. scanf() has the ability to detect base through %i but suppose base ten for %d. In this tutorial, we will learn some points that will help use to find the basic difference between %d and %i. So let’s get started

What is Format specifiers in C

• The format specifier are used in C programming language to define the input and outputs. Formate specifiers help the compiler to know the type of data in a variable when get input through use of scanf() function and printing using print() function

• Commonly used Format specifiers are listed here

• Format Specifier	Type
  %c	Character
  %d	it is an integer sign
  %e or %E	it used as a scientific notation for float
  %f	It used for Float values
  %g or %G	It is like the %e or %E
  %hi	Signed integer (short)
  %hu	Unsigned Integer (short)
  %i	Unsigned integer
  %l or %ld or %li	Long
  %lf	Double
  %Lf	Long double
  %lu	Unsigned int or unsigned long
  %lli or %lld	Long long
  %llu	Unsigned long long
  %o	Octal representation
  %p	Pointer
  %s	String
  %u	Unsigned int
  %x or %X	Hexadecimal representation
  %n	Prints nothing
  %%	Prints % character

Difference between %d and %i format specifier in C language

• We will get the difference according to printf and scanf. First for printf
• For printf there is no difference between %i and %d format specifier. Let’s solve an example

• Output:
  num ans for %d is = 15
  num ans for %i is = 15
  Now find the difference on the basis of scanf
• In the case of scanf function %d suppose the base as 10 but %i detects the base. So these two specifiers work in different fashions during input specifier configuration. So in simple form 015 will be 10 for %d and 15 for %i
• Solve example

• include <stdio.h>
  
  int main()
  {
  	int X=0;
  	int y=0;
  	
  	printf("Put value  x: ");
  	scanf("%d",&x);
  
  	printf("Put value y: ");
  	scanf("%i",&y);	
  	
  	printf("x=%d, y=%d\n",x,y);
  	
  	return 0;
  }
  put value of x:20
  put vaue of x:0x30
  x=20, y=30
  

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