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startsWith

Determine if string starts with substring in Stateflow chart

Since R2021b

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Syntax

tf = startsWith(str,substr)
tf = startsWith(str,substr,IgnoreCase=true)

Description

tf = startsWith(str,substr) returns 1 (true) if the string str starts with the substring substr, and returns 0 (false) otherwise.

example

tf = startsWith(str,substr,IgnoreCase=true) checks if str starts with substr, ignoring any differences in letter case.

example

Note

The startsWith operator is not supported in Stateflow® charts that use C as the action language.

Examples

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Return a value of 0 (false) because the string "Hello, world!" does not start with the substring "hello".

str = "Hello, world!";
substr = "hello";
x = startsWith(str,substr);

Stateflow chart that uses the startswith operator in a state.

Return a value of 1 (true) because the string "Hello, world!" starts with the substring "hello" when you ignore case.

str = "Hello, world!";
substr = "hello";
x = startsWith(str,substr,IgnoreCase=true);

Stateflow chart that uses the startswith operator in a state.

Input Arguments

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Input string, specified as a string scalar. Enclose literal strings with double quotes.

Example: "Hello"

Substring, specified as a string scalar. Enclose literal strings with double quotes.

Example: "Hello"

Limitations

  • This operator does not support the use of Stateflow structure fields or messages. For more information about structures in Stateflow, see Access Bus Signals.

Version History

Introduced in R2021b

See Also

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