What is %d in C Programming?

Question

Could someone tell me what is %d in C Programming?

Answer 1

%d is a format specifier, used in C Language. Now a format specifier is indicated by a % (percentage symbol) before the letter describing it. In simple words, a format specifier tells us the type of data to store and print. Now, %d represents the signed decimal integer. And for integer, %i is the format. If you wish to learn C and master it, check out the C Language course and watch the following video on C Tutorial for Beginners to get a better understanding.

Answer 2

In C programming, the format specifier %d is used to handle integer numbers in functions such as printf and scanf.

An integer value is printed using ‘printf’: %d. It instructs printf to print the argument as a signed decimal integer and to anticipate an input of type int.

int number = 25;

printf(“The number is %d\n”, number);

Output:

The number is 42.

To read an integer value from user input, use scanf: %d. It instructs scanf to store the outcome in a variable of type int and to anticipate input in the form of a signed decimal integer.

int number;

printf(“Enter the number”);

scanf(“%d”, &num);

printf(“You entered “%d\n”, number);

Output:

You entered 42.

Answer 3

In the C programming language, the ‘%d’ character is abbreviated and reported in functions like printf() as a delivery pointer.

Use Case

• In printf(): It alters the appearance of the output for an integer variable. For example:

               int num = 10;  

              printf("The number is: %d\n", num);  

              Results in the output: The number is: 10.

• In scanf(): An integer value is read from the user in this case. For example:

                int num;  

                printf("Enter a number: ");  

                scanf("%d", &num);  

Conclusion:

• %d is meant only for integers (that is, in human-readable form).  

• It serves as a filler in formatted strings, which helps in taking and giving out integers efficiently.