例子:在这里,toUpperCase()方法被调用str字符串,将所有小写字母转换为大写。得到的字符串,"HELLO WORLD", 被赋值给变量upperStr. Javascript conststr ="hello world";constupperStr = str.toUpperCase();console.log(upperStr);// Output: "HELLO WORLD" 输出 HELLO WORLD 注:amanv09...
JavaScript provides several built-in methods for manipulating strings, including one called toUpperCase() which can be used to convert the first letter of a string to uppercase.
Let's say I want to make the h in the above string to uppercase. I could do that by selecting the first letter of the string, converting it to uppercase, and concatenating the capitalized letter with the rest of the string. const capitalizedMessage = message.charAt(0).toUpperCase() + ...
In JavaScript, toUpperCase() is a string method that is used to convert a string to uppercase. Because the toUpperCase() method is a method of the String object, it must be invoked through a particular instance of the String class. Syntax In JavaScript, the syntax for the toUpperCase() me...
How do I make the first letter of a string uppercase, but not change the case of any of the other letters? For example: "this is a test"->"This is a test" "the Eiffel Tower"->"The Eiffel Tower" "/index.html"->"/index.html" ...
To convert a string to uppercase, we can use the built-in method in JavaScript. Here is an example that converts a string to uppercase…
#Check if the First Letter of a String is Uppercase in JavaScript To check if the first letter of a string is uppercase: Use theString.charAt()method to get the first letter of the string. Use theString.toUppercase()method to convert the letter to uppercase. ...
What Is a String to Uppercase Converter? This tool converts a string to an uppercase string. It transforms each character in the string to uppercase. Super simple! String to Uppercase Converter Examples Click to try! click me Uppercase a String This example converts a string to upper...
In JavaScript, toLocaleUpperCase() is a string method that is used to convert a string to uppercase based on locale. Because the toLocaleUpperCase() method is a method of the String object, it must be invoked through a particular instance of the String class.Syntax...
JavaScript Code:// Write a JavaScript function that accepts a string as a parameter and converts the first letter of each word to uppercase. function uppercase(str) { // Split the input string into an array of words var array1 = str.split(' '); // Initialize an empty array to ...