printf returns an integer value, which is the total number of printed characters. For example: if you are printing "Hello" using printf, printf will return 5. In first statement "Hello\n" there are 6 characters, "\n" is a single character to print new line, it is called new line character.
The fprintf() , printf() , and sprintf() functions return the number of characters output, or a negative value if an output error occurs. The ending null character is not counted.
printf() - printf() returns the number of characters successfully written on the output. It is used to simply print data in the output. scanf() - It returns the number of data items that have been entered successfully.
The printf() is a library function to send formatted output to the screen. The function prints the string inside quotations. To use printf() in our program, we need to include stdio.h header file using the #include <stdio.h> statement.
printf is a C function belonging to the ANSI C standard library, and included in the file stdio. h. Its purpose is to print formatted text to the standard output stream. Hence the "f" in the name stands for "formatted". It takes the following unusual syntax: printf(string format, items-to-format)
printf is a special function because it receives a variable number of arguments. The first parameter is fixed and is the format string. It includes text to be printed literaly and marks to be replaced by the text obtained from the additional parameters.
How to print % using printf()? Generally, printf() function is used to print the text along with the values. If you want to print % as a string or text, you will have to use '%%'. Neither single % will print anything nor it will show any error or warning.
The printf() and scanf() functions are used for input and output in C language. Both functions are inbuilt library functions, defined in stdio.h (header file).
The printf() function
It returns the number of characters that are printed. If there is some error then it returns a negative value.
printf() function is used for displaying output to the screen and in printf() function we use format specifiers like %c, %d, etc to detect the data type of variable which we give as input. Return type of printf function is integer. It returns the total no of characters given as output by printf().
Printing has no effect on the ongoing execution of a program. It doesn't assign a value to a variable. It doesn't return a value from a function call.
print just shows the human user a string representing what is going on inside the computer. The computer cannot make use of that printing. return is how a function gives back a value.
A return is a value that a function returns to the calling script or function when it completes its task. A return value can be any one of the four variable types: handle, integer, object, or string. The type of value your function returns depends largely on the task it performs.
The scanf() function returns the number of fields that were successfully converted and assigned. The return value does not include fields that were read but not assigned. The return value is EOF for an attempt to read at end-of-file if no conversion was performed.
printf() method is used to write a output. printf() returns negative value, if any kind of error occurs.
A return statement ends the execution of a function, and returns control to the calling function. Execution resumes in the calling function at the point immediately following the call. A return statement can return a value to the calling function. For more information, see Return type.
The return_type is the data type of the value the function returns. Some functions perform the desired operations without returning a value. In this case, the return_type is the keyword void. Function Name − This is the actual name of the function.
This statement is not correct but, you can use printf within printf. Upon successful return, printf functions return the number of characters printed (not including the trailing '\0' used to end output to strings). Save this answer.
The printf() function is used to format and print a series of characters and values to the standard output. The format argument is a string containing C language conversion specifications.
Note that the name printf is actually not a C keyword and not really part of the C language. It is a standard input/output library pre-defined name.
You create an identifier by specifying it in the declaration of a variable, type, or function. In this example, result is an identifier for an integer variable, and main and printf are identifier names for functions.
The following line shows how to output the value of a variable using printf. printf("%d", b); The %d is a placeholder that will be replaced by the value of the variable b when the printf statement is executed. Often, you will want to embed the value within some other words.