added case in binaryStrLen for input 0 length is 1

src/conversionOfNumbers/conversionOfNumbers.c

@@ -6,13 +6,17 @@
 
 int binaryStrLen(int input){
     int length;
+    if(input > 0){
         for(int x = 0; x < input; x++){
             if(pow(2,x) >= input + 1){
                 length = x;
                 break;
                 }
         }
-        return length;
+    }else if(input == 0){
+        length = 1;
+    }
+    return length;
 }
 
 char* convertIntToBinaryStr(int input){