%d in c
%d is a format specifier in the C programming language that is used to print or scan an integer value. It is part of the printf() and scanf() functions in C. When using printf(), %d is used to display the value of an integer variable. When using scanf(), %d is used to read an integer value from the user.
Example using printf():
int num = 10;
printf("The value of num is %d\n", num);
Output:
The value of num is 10
Example using scanf():
int num;
printf("Enter a number: ");
scanf("%d", &num);
printf("You entered: %d\n", num);
Output:
Enter a number: 5
You entered: 5
In both examples, %d is used as a placeholder for the integer value. It tells the printf() and scanf() functions where to insert or read the integer value. The & operator is used with scanf() to get the address of the variable where the integer value should be stored.