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  1. #include<stdio.h>
  2. #include<string.h>
  3. int main()
  4. {
  5. char arr[] = "456123";
  6. int len = strlen(arr);
  7. printf("%d", len);
  8. return 0;
  9. }
  10.  
Success #stdin #stdout 0s 5288KB
stdin
Standard input is empty
stdout
6