Write a Python algorithm as a function which takes as parameters a pair of strings (s1, s2) and which returns the string s obtained by concatenating in an alternative way the characters of s1 and s2. Example: for (s1, s2) = (“Python” , “Java”) the function returns the string s = ‘PJyatvha’
def concatenate_alternate(s1, s2): s = '' for i in range(max(len(s1), len(s2))): if i < len(s1): s += s1[i] if i < len(s2): s += s2[i] return s # Example s1 = "Python" s2 = "Java" s = concatenate_alternate(s1, s2) print(s) # Output: PJyatvha
In this algorithm:
- we create an empty string s: which will hold our concatenated string.
- We use the max() function: to get the length of the longer string so we know how many iterations we need to do.
- We loop through each index i: up to the length of the longer string.
- For each iteration: we check if i is within the bounds of s1 and s2. If it is, we add the character at index i from the respective string to our s string.
- Finally: we return the concatenated s string.