printf() Function Return Value

What is the return value from printf() function?

printf function always returns the number of characters printed. Let us understand this with an example:

int a=10;
printf("%d",printf("%d %d %d", a,a,a));

In this above program the inner printf is first called which prints value of a, three times with space between each value, 10 10 10. Total 5 characters get printed (3 value of 10 and 2 spaces).

As explained earlier the inner printf after printing the values, returns the number of characters printed, 5 which is printed by the outer printf.

The output of the above program is

10 10 10 5

A function always returns a value and printf function returns the number of characters successfully printed.

Editorial Team at Geekinterview is a team of HR and Career Advice members led by Chandra Vennapoosa.

Editorial Team – who has written posts on Online Learning.

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