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TypeScript - get last character of string
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In this article, we would like to show you how to get the last character of a string in TypeScript.
Below we present two solutions on how to do that:
- Using
substring()method, - Using
slice()method.
The below example shows how to use .substring() method to get the last character of the text string.
Runnable example:
xxxxxxxxxx1
const text: string = '12345';2
const substring: string = text.substring(text.length - 1);3
4
console.log(substring); // 5Output:
xxxxxxxxxx1
5Another practical example:
xxxxxxxxxx1
// true means string is empty2
3
console.log(''.substring(''.length - 1) === ''); // empty4
console.log('1'.substring('1'.length - 1)); // 15
console.log('12'.substring('12'.length - 1)); // 26
console.log('123'.substring('123'.length - 1)); // 37
console.log('1234'.substring('1234'.length - 1)); // 48
console.log('12345'.substring('12345'.length - 1)); // 5Output:
xxxxxxxxxx1
true2
13
24
35
46
5The below example shows the use of .slice() method with a negative index to get the last character of the text string.
Runnable example:
xxxxxxxxxx1
const text: string = '12345';2
const substring: string = text.slice(-1);3
4
console.log(substring); // 5Output:
xxxxxxxxxx1
5In the second example, we can see that we can also use string slice() with negative indexes on a shorter or empty string which will give us the following results:
xxxxxxxxxx1
// true means string is empty2
3
console.log(''.slice(-1) === ''); // empty4
console.log('1'.slice(-1)); // 15
console.log('12'.slice(-1)); // 26
console.log('123'.slice(-1)); // 37
console.log('1234'.slice(-1)); // 48
console.log('12345'.slice(-1)); // 5Output:
xxxxxxxxxx1
true2
13
24
35
46
5