![]() ![]() This creates a new string starting from the index specified until the end of the word. One way to do this is by using the slice() method. Next, you want to isolate and cut off that first character and keep the remainder of the string. let capFirstLetter = myGreeting.toUpperCase() Save this operation in a new variable called capFirstLetter. Then you call the toUpperCase() method on that specific letter.Īs a reminder, indexing in JavaScript (and most programming languages) starts at 0, so the first letter has an index of 0. You first locate and extract the first letter of that string by using its index. Say there is a variable called myGreeting with the string value of hello, in all lowercase letters. ![]() What if you want to make only the first letter of a string a capital?īelow is a simple example that shows you one way to do just that. How to capitalize only the first letter in a string in JavaScript console.log('I am shouting!'.toUpperCase()) Īny capital letters already in the string will not be affected and will remain unchanged when the toLowerCase() method gets called. This means that there will now be two strings: the original and the newly converted capitalized one. The string specified is converted to a new one whose contents consist of only all uppercase letters. The general syntax for calling the method looks like this: String.toUpper()Īs strings in JavaScript are immutable, the toLowerCase() method does not change the value of the string specified. The toUpperCase() method is similar to the toLowerCase() method but it instead converts the string value to uppercase. How to use the toUpperCase() method in JavaScript const anotherGreeting = 'GOOD MORNING!!' Ĭonsole.log(anotherGreeting.toLowerCase()) They are all then converted to lowercase when the toLowerCase() method is applied. The string in the example below consists of all capital letters. These letters preserve their original form. The string myGreeting consists of only one capital letter that gets converted to lowercase.Īny letters that are already lowercase are not affected by the toLowerCase() method, only uppercase ones. It means that the old, original string is not changed or affected in any way. The toLowerCase() method converts the string specified into a new one that consists of only lowercase letters and returns that value. The toLowerCase() method doesn't take in any parameters. The general syntax for the method looks like this: String.toLowerCase() The toLowerCase method converts a string to lowercase letters. Let's get started! How to use the toLowerCase() method in JavaScript We'll also go over how to make only the first letter in a word uppercase and how to make the first letter of every word in a sentence uppercase. ![]() If the word has no vowels, then the code assumes it's an acronym and converts the entire word to upper.This article explains how to convert a string to lowercase and uppercase characters. are considered word ending characters so that in both cases the S and the P will be converted to upper case.Īlso there's a list of special words that should be all caps, like "usa" my code will convert that to USA. For example "steve_pupel" or "steve.pupel". ![]() There's a string variable which holds each character that could be considered a word ending. There are a couple nice features about the code. Then a the code loops through each array element and converts the first letter of each word to upper case. The basic technique is that there is a first function which breaks up a string into separate words and stores each word as an array element. I wrote a couple functions many years back to solve this exact problem. ![]()
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