revers numbers

SanjarH · SanjarH · commit 720d45b68ce7 · 2023-03-21T18:53:18.000+01:00
diff --git a/revers_int.py b/revers_int.py
@@ -0,0 +1,53 @@
+# Learn Python together
+"""Given a signed 32-bit integer x, return x with its digits reversed.
+If reversing x causes the value to go outside the signed 32-bit integer
+range [-231, 231 - 1], then return 0."""
+
+# Solution 1 for 32-bit integers 
+def reverse_number(x):
+    pos = 1
+    if x < 0:
+        # negating the input number if its negative and store in pos
+        pos = -1
+        x = -x 
+    # converting number to str and reverse it   
+    reverse = int(str(x)[::-1])
+    # return reverse if its 32 bit integer
+    return pos * reverse if reverse <= 2**31 - 1 else 0   
+    
+# check            
+print(reverse_number(321)) # -> 123
+print(reverse_number(-567)) # -> -765
+print(reverse_number(2585645646453)) # -> 0
+print(reverse_number(-2585645646453)) # -> 0
+
+# Solution 2 for 64-bit integers
+def reverse_number2(x):
+   # for negative inputs
+    pos = 1
+    if x < 0:
+        # negating the input number if its negative and store in pos
+        pos = -1
+        x = -x
+    reverse = 0  
+    # use a while loop for interation
+    while x > 0:
+        # getting last digit of x  
+        pop = x % 10
+        # use floor division for droping last digit
+        x //= 10  
+        # multipe the previous reversed digits by 10 and add th current digit
+        reverse = reverse * 10 + pop
+    # return multiplied reversed num by pos
+    return reverse * pos
+# check       
+print(reverse_number2(321)) # -> 123
+print(reverse_number2(-567)) # -> -765
+print(reverse_number2(2585645646453)) # -> 3546465465852
+print(reverse_number2(-2585645646453)) # -> -3546465465852
+
+
+
+            
+        
+    
