C Program to Demonstrate Printf inside Another Printf Statement

Printf inside printf in C : Example 1

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#include
#include
void main()
{
int num=1342;
clrscr();
printf("%d",printf("%d",printf("%d",num)));
getch();
}

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Output :

134241

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How ?

1. Firstly Inner printf is executed which results in printing 1324 
2. This Printf Returns total number of Digits i.e  4 and second inner printf will looks like

3. printf("%d",printf("%d",4));

4. It prints 4 and Returns the total number of digits i.e 1 (4 is single digit number )

5. printf("%d",1);

6. It prints simply 1 and output will looks like 132441

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Rule :

Inner printf returns Length of string printed on screen to the outer printf