Platform and version requirements: JVM (1.0), JS (1.1)

fun String.startsWith(
    prefix: String, 
    ignoreCase: Boolean = false
): Boolean

Platform and version requirements: Native (1.3)

fun String.startsWith(
    prefix: String, 
    ignoreCase: Boolean
): Boolean

Returns true if this string starts with the specified prefix.

Platform and version requirements: JVM (1.0), JS (1.1)

fun String.startsWith(
    prefix: String, 
    startIndex: Int, 
    ignoreCase: Boolean = false
): Boolean

Platform and version requirements: Native (1.3)

fun String.startsWith(
    prefix: String, 
    startIndex: Int, 
    ignoreCase: Boolean
): Boolean

Returns true if a substring of this string starting at the specified offset startIndex starts with the specified prefix.

Platform and version requirements: JVM (1.0), JS (1.0), Native (1.0)

fun CharSequence.startsWith(
    char: Char, 
    ignoreCase: Boolean = false
): Boolean

Returns true if this char sequence starts with the specified character.

Platform and version requirements: JVM (1.0), JS (1.0), Native (1.0)

fun CharSequence.startsWith(
    prefix: CharSequence, 
    ignoreCase: Boolean = false
): Boolean

Returns true if this char sequence starts with the specified prefix.

Platform and version requirements: JVM (1.0), JS (1.0), Native (1.0)

fun CharSequence.startsWith(
    prefix: CharSequence, 
    startIndex: Int, 
    ignoreCase: Boolean = false
): Boolean

Returns true if a substring of this char sequence starting at the specified offset startIndex starts with the specified prefix.