feat: convert str to int and vice-versa

elements/6_1_Integer_String_Converter/solution.py

@@ -0,0 +1,36 @@
+# Question: Implement a string to integer and vice versa converter
+# without using int function
+
+
+def convertToStr(n):
+    ret = []
+    if n == 0:
+        return "0"
+    neg = False
+    if n < 0:
+        neg = True
+        n *= -1
+    while n:
+        x = n % 10
+        ret.append(chr(48 + x))
+        n //= 10
+
+    return ("-" if neg else "") + "".join(ret[::-1])
+
+
+def convertToInt(s):
+    ret = 0
+    neg = False
+    for c in s:
+        if c == "-":
+            neg = True
+        else:
+            ret *= 10
+            ret += ord(c) - 48
+
+    return ret * (-1 if neg else 1)
+
+
+print("Convert to STR: " + convertToStr(-500))
+
+print("Convert to INT: " + str(convertToInt("-500") + 10))