What is the return value of printf and scanf?

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.

Does scanf return value?

Return Value 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.

Does printf return any value?

The printf() function is used for printing the output. It returns the number of characters that are printed. If there is some error then it returns a negative value.

Can we use printf in scanf?

So in your code scanf() returns 1 to printf() and thus output of program is 1 . This is because if more than one statement are used in printf() execution orders starts from right to left. Thus scanf() is executed first followed by printf() .

What is the use of printf () and scanf () functions?

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).

What does Fscanf return in C?

The fscanf() function returns the number of fields that it successfully converted and assigned. The return value does not include fields that the fscanf() function read but did not assign. The return value is EOF if an input failure occurs before any conversion, or the number of input items assigned if successful.

What is the return type of scanf () function?

scanf returns EOF if end of file (or an input error) occurs before any values are stored. If any values are stored, it returns the number of items stored; that is, it returns the number of times a value is assigned by one of the scanf argument pointers.

What is the return value of the function printf ()?

The printf() function will return the number of characters printed.

Why does printf return an int?

printf is a library function of stdio. h, it is used to display messages as well as values on the standard output device (monitor). 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.

How does scanf printf work?

Scanf working principle It iterates each characters of user provided string and stops at “%”. Now scanf reads a line from stdin. User’s input comes as a string. It converts string to char, int, long, float, double and sets the value of the pointer located at the argument.

What is the return type of printf () function and what it returns?

1) Return type and value of printf function h, it is used to display messages as well as values on the standard output device (monitor). 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.

What is difference between printf () and scanf ()?

Format specifier string: Note: The major difference between printf and scanf is, In printf() we pass variable values whereas in scanf() we pass the variable address.

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