C Program to Demonstrate Printf inside Another Printf Statement

Printf inside printf in C : Example 1

#include<stdio.h>
int main() {
	int num = 1342;
	printf("%d", printf("%d", printf("%d", num)));
	return(0);
}

#include<stdio.h>

int main() {

int num = 1342;

printf("%d", printf("%d", printf("%d", num)));

return(0);

}

Output :

134241

134241

How ?

Firstly Inner printf is executed which results in printing 1324
This Printf Returns total number of Digits i.e 4 and second inner printf will looks like
printf("%d",printf("%d",4));
1
printf("%d",printf("%d",4));
It prints 4 and Returns the total number of digits i.e 1 (4 is single digit number )
printf("%d",1);
1
printf("%d",1);
It prints simply 1 and output will looks like 132441

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

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