diff --git a/PrimesNumbers.py b/PrimesNumbers.py
new file mode 100644
index 0000000..14582ef
--- /dev/null
+++ b/PrimesNumbers.py
@@ -0,0 +1,21 @@
+def find_primes(num1, num2):
+    for number in range(num1, num2 + 1):
+        if number < 2:
+            continue
+        
+        is_prime = True
+        divisor = 2
+        
+        while divisor < number:
+            if number % divisor == 0:
+                is_prime = False
+                break
+            divisor += 1
+        
+        if is_prime:
+            print(number)
+            
+num1 = int(input("Enter the first number: "))
+num2 = int(input("Enter the second number: "))
+
+find_primes(num1, num2)
\ No newline at end of file
diff --git a/StringModify.py b/StringModify.py
new file mode 100644
index 0000000..ec56de0
--- /dev/null
+++ b/StringModify.py
@@ -0,0 +1,17 @@
+def string_check (text):
+    if not isinstance(text, str):
+        return "the input must be a string"
+
+    modified_String = ""
+
+    for char in text:
+        if char.isupper():
+            modified_String += " " + char.lower()
+        else:
+            modified_String += char
+
+    return modified_String
+
+input_text = input("please enter a string text: ")
+output_text = string_check(input_text)
+print("the modified string is:", output_text)
\ No newline at end of file