strncmp

Compare first N characters of strings in Requirements Table block (case sensitive)

Since R2022b

Syntax

tf = strncmp(str1,str2,n)

Description

tf = strncmp(str1,str2,n) compares up to n characters of str1 and str2. The operator returns 1 (true) if the strings are identical and 0 (false) otherwise. Use this operator in the Requirements Table block.

Examples

Compare First N Characters of Strings

In a Requirements Table block, create a requirement that checks if the string "Hello, world!" matches the first thirteen characters of the string "Hello, world!!!!!!!!!!!!".

y = strncmp("Hello, world!","Hello, world!!!!!!!!!!!!",13)

Input Arguments

str1, str2 — Input strings

string scalar

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

Example: "Hello"

Data Types: string

n — Number of characters checked

positive integer

Number of characters checked, starting at the beginning of each string, specified as a positive integer.

Data Types: single | double | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64

Limitations

• This operator does not support the use of Simulink.Bus object fields.

Version History

Introduced in R2022b