is not in

Compares two strings and evaluates to true if the second does not contain the first, false if it does.

# Metadata

Platforms: desktop, server, mobile OS: mac, windows, linux, ios, android Introduced: 1.0 Security:

# Syntax

subString is not in string

# Params

- substring : The substring and string are both strings, or expressions that evaluate to strings. - string :

# Examples

"S" is not in "BSD" -- evaluates to false

# Description

Use the is not in operator to find out whether a string does not contain a substring.

The expression firstString is not in secondString is equivalent to

not (secondString contains firstString)

The is not in operator is the logical inverse of the is in operator. When one is true, the other is false.

# Tags

text processing,

# See

- **keyword:** string - **glossary:** evaluate, string, operator - **operator:** contains, is in