HackerRank Digit Frequency solution in C YASH PAL, 17 July 202416 January 2026 HackerRank Digit Frequency solution in c – In this tutorial am going to solve the HackerRank digit frequency problem in c programming with practical program code example and step-by-step explanation. in this problem we need to take a string as an input value. this string consist of alphabets and digits and we need to fine the frequency of each digit in the string and need to print the first ten digits on the output screen with their frequency.Digit frequency solutionHackerRank Digit Frequency solution in C#include <stdio.h> #include <string.h> #include <math.h> #include <stdlib.h> int main() { int* nums = (int*) malloc(10 * sizeof(int)); char c; for(int i = 0; i < 10; i++) *(nums+i) = 0; while(scanf("%c", &c) == 1) if(c >= '0' && c <= '9') (*(nums+(c-'0')))++; for(int i = 0; i < 10; i++) printf("%d ", *(nums+i)); return EXIT_SUCCESS; }#include <stdio.h> #include <string.h> #include <math.h> #include <stdlib.h> int main() { int* nums = (int*) malloc(10 * sizeof(int)); char c; for(int i = 0; i < 10; i++) *(nums+i) = 0; while(scanf("%c", &c) == 1) if(c >= '0' && c <= '9') (*(nums+(c-'0')))++; for(int i = 0; i < 10; i++) printf("%d ", *(nums+i)); return EXIT_SUCCESS; }Second solution#include <stdio.h> #include <stdlib.h> #include <string.h> int main() { char *s; s = malloc(1024 * sizeof(char)); scanf("%s", s); s = realloc(s, strlen(s) + 1); int len = strlen(s), i; int arr[10]; for(i = 0; i < 10; i++) arr[i] = 0; for(i = 0; i < len; i++) { if(s[i] >= '0' && s[i] <= '9') { arr[(int)(s[i] - '0')]++; } } for(i = 0; i < 10; i++) printf("%d ", arr[i]); printf("\n"); free(s); return 0; }#include <stdio.h> #include <stdlib.h> #include <string.h> int main() { char *s; s = malloc(1024 * sizeof(char)); scanf("%s", s); s = realloc(s, strlen(s) + 1); int len = strlen(s), i; int arr[10]; for(i = 0; i < 10; i++) arr[i] = 0; for(i = 0; i < len; i++) { if(s[i] >= '0' && s[i] <= '9') { arr[(int)(s[i] - '0')]++; } } for(i = 0; i < 10; i++) printf("%d ", arr[i]); printf("\n"); free(s); return 0; } C Solutions coding problems solutions Hackerrank Problems Solutions cHackerRank