String repeat (8kyu) [Python]

Chek kata on Codewars

Description:

Write a function called repeat_str which repeats the given string src exactly count times.

repeatStr(6, "I") // "IIIIII"
repeatStr(5, "Hello") // "HelloHelloHelloHelloHello"

Solution 1.1

Let's start with a loop solution.

def repeat_str(repeat, string):
    new_str = ''
    while repeat > 0:
        new_str += string
        repeat -= 1
    return new_str

Solution 1.2

def repeat_str(repeat, string):
    new_str = ''
    for _ in range(repeat):
        new_str += string
    return new_str

Solution 1.3

We can add an array to this for loop.

def repeat_str(repeat, string):
    new_str = []
    for _ in range(repeat):
        new_str.append(string)
    return "".join(new_str)

Solution 2.1

def repeat_str(repeat, string):
    return string * repeat

Solution 3.1

Let's solve it recursively.

def repeat_str(repeat, string):
    return string if repeat == 1 else string + repeat_str(repeat - 1, string)