Code:
#include <stdio.h>
#include <string.h>

int main(void)
{
	char *num = "73167176531330624919225119674426574742355349194934\
		96983520312774506326239578318016984801869478851843\
		85861560789112949495459501737958331952853208805511\
		12540698747158523863050715693290963295227443043557\
		66896648950445244523161731856403098711121722383113\
		62229893423380308135336276614282806444486645238749\
		30358907296290491560440772390713810515859307960866\
		70172427121883998797908792274921901699720888093776\
		65727333001053367881220235421809751254540594752243\
		52584907711670556013604839586446706324415722155397\
		53697817977846174064955149290862569321978468622482\
		83972241375657056057490261407972968652414535100474\
		82166370484403199890008895243450658541227588666881\
		16427171479924442928230863465674813919123162824586\
		17866458359124566529476545682848912883142607690042\
		24219022671055626321111109370544217506941658960408\
		07198403850962455444362981230987879927244284909188\
		84580156166097919133875499200524063689912560717606\
		05886116467109405077541002256983155200055935729725\
		71636269561882670428252483600823257530420752963450";
	
	printf("%i\n", strlen(num));
	


	return 0;
}
The output of this program is 1,038, which I don't understand considering the number is 1,000 digits long. Where did these extras come from?