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How can we check if a string starts with a sub-string in Rust
okwudili onyejiaku
Overview
We can use the starts_with() method to check if a string starts with another string, a sub-string. This method returns true if the string begins with the specified match or sub-string. Otherwise, it returns false.
Syntax
string.starts_with(substring)
Check if a particular string begins with another sub-string in Rust
Parameter values
string: This is the string that we want to check to see if it begins with the specified sub-string.
substring: This is the string that we want to check for at the beginning ofstring.
Return value
The starts_with() method returns a boolean value. It returns a true value if the given string starts with the specified sub-string. Otherwise, it returns a false value.
Example
fn main() {
// create some strings
let str1 = "Edpresso";
let str2 = "Educative";
let str3 = "Rust";
let str4 = "Educative is the best platform!";
// create strings to check
let start1 = "Ed";
let start2 = "cative";
let start3 = "R";
let start4 = "Educative is";
// check if strings starts with the sub-strings
println!(" {} starts with {}: {}",str1, start1, str1.starts_with(start1));
println!(" {} starts with {}: {}",str2, start2, str2.starts_with(start2));
println!(" {} starts with {}: {}",str3, start3, str3.starts_with(start3));
println!(" {} starts with {}: {}",str4, start4, str4.starts_with(start4));
}Check if a string starts with a particular sub-string in Rust
Explanation
- Lines 3–6: We create some strings.
- Lines 9–12: We create the sub-strings that we want to check for at the beginning of the strings we created.
- Lines 15–18: With the
starts_with()method, we check if the strings start with the specified sub-strings and print the results to the console.
RELATED TAGS
rust
communitycreator
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okwudili onyejiaku
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