startswith

string

Checks if a string starts with a specific prefix

Syntax

startswith(string, prefix)

string (string)

The string to check

prefix (string)

The prefix to look for

boolean

True if string starts with prefix, false otherwise

Input:

startswith("/api/users", "/api")

Output:

true

Input:

startswith("hello", "hi")

Output:

false

Input:

"test.txt" | startswith("test")

Output:

true

The startswith() function checks whether a string begins with a specified prefix. Returns true if it does, false otherwise.

Use startswith() to filter paths, validate formats, or check string patterns. Useful for routing, file extension checking, and protocol validation.