Add error handling when not a number as sugested

subjects/getarea/README.md

@@ -1,25 +0,0 @@
-## get-area
-
-### Instructions
-
-Write a program that takes a positive number as radius and prints the area of a circle.
-  - The area of the circle is `3.14` times the radius squared.
-  - Only positive numbers will be accepted, otherwise print `Error` followed by (`'\n'`)
-  - If the number of arguments is not `1` print (`'\n'`)
-  - The output must be an integer.
-
-
-###  Usage
-
-```console
-$ go run . | cat -e
-$
-$ go run . 10 | cat -e
-314$
-$ go run . 4 | cat -e
-50$
-$ go run . -10 | cat -e
-Error$
-$ go run . "Hello World!" | cat -e
-Error$
-```

subjects/sumthemall/README.md

@@ -0,0 +1,16 @@
+## sumthemall
+
+### Instructions
+
+Create a program that receives a number of arguments representing whole numbers and displays the sum of the total. If there are not enough arguments or there is an overflow display 0 followed by a new line. If the argument is not a number display 0.
+
+### Usage
+
+```console
+$ go run . 23 34 53 | cat -e
+110$
+$ go run . 1000 2000 3000 4000 | cat -e
+10000$
+$ go run . a | cat -e
+0$
+```

subjects/ultimatedivmod/README.md

@@ -2,7 +2,7 @@
 
 ### Instructions
 
-Create the following function.
+- Write a function that will be formatted as below.
 
 ### Expected function
 
@@ -11,9 +11,10 @@ func UltimateDivMod(a *int, b *int) {
 
 }
 ```
-`UltimateDivMod` should divide the dereferenced value of `a` by the dereferenced value of `b`.
-- Store the result of the division in the `int` which `a` points to.
-- Store the remainder of the division in the `int` which `b` points to.
+
+- This function will divide the `int` **a** and **b**.
+- The result of this division will be stored in the `int` pointed by **a**.
+- The remainder of this division will be stored in the `int` pointed by **b**.
 
 ### Usage