In string manipulation, which function is used to repeats an input string?

The function used to repeat an input string is the Repeat function. This function allows you to specify a string and the number of times you want it to be repeated. It is particularly useful when you need to generate a string that consists of a repeated sequence, such as creating visual elements or formatted text in reports where duplication of certain characters or words is required.

In contrast, the Left function primarily extracts a specified number of characters from the start of a string, while the TextBetween function is designed to retrieve a substring located between two specified delimiters. The Qualify function is used to ensure that field names in Qlik are unique by adding a prefix, and it does not manipulate strings in the context of repetition.

Thus, the Repeat function is the appropriate choice for tasks involving the repetition of strings.