course update of 2023-11-27 14:49:47

Algo/B2/Exercises/String exercise.md

@@ -0,0 +1,62 @@
+# String Exercises
+
+## Exercise 1.1 (Search)
+
+```python
+def search(x: str, s:str) -> int:
+  """
+  Function that counts the number
+  of occurences of a given character
+  in a string
+  
+  @params x (str): the keyword
+  @params s (str): the string
+  @return: (int): the number of occurences
+  """
+  i = 1
+  n = len(s)
+  for loop in range(n):
+    if s[n] == x:
+      i += 1
+  return i
+ 
+ def search2(s: str, x: str) -> int:
+   """
+  Function that counts the number
+  of occurences of a given character
+  in a string
+  
+  @params x (str): the string
+  @return: (int): the occurence where is appear
+  """
+  i = 1
+  n = len(s)
+  for i in range(n):
+    if s[i] == x:
+      return i
+  return -1
+```
+
+## Exercise 1.2 (Palindrome)
+
+```python
+def palindrome(sentence: str) -> bool:
+  """
+  Function that check if a number is a palindrome
+  @params sentence(str): the sentence to check
+  @return (bool): Either a palindrome or not
+  """
+  newSentence = ""
+  oldSentence = ""
+  for element in sentence:
+    if element != " ":
+      newSentence = element + newSentence
+  for element in sentence:
+      if element != " ":
+        oldSentence += element
+  if newSentence == oldSentence:
+    return True
+  else:
+    return False
+```
+