refactoring: moved if statement for input 0 to top

src/conversionOfNumbers/conversionOfNumbers.c

@@ -6,16 +6,13 @@
 
 int binaryStrLen(int input){
     int length;
-    if(input > 0){
-        for(int x = 0; x <= input; x++){
+    if (input == 0) return 1;
+    for (int x = 0; x <= input; x++){
         if(pow(2,x) >= input + 1){
             length = x;
             break;
             }
         }
-    }else if(input == 0){
-        length = 1;
-    }
     return length;
 }