Search results
22 cze 2009 · Use the charCodeAt () method to get the character code of the first character. Using if Statement , which check within what range of values the character code falls. If it falls between the character codes for A and Z, Its Uppercase, character code between a and z ,Its Lowercase. and so on.
Instead, use this regex: function isUpper(str) { return !/[a-z]/.test(str) && /[A-Z]/.test(str) }. Strings like "123" or "WE23a" returns false while strings like "W390" returns true. – AlienKevin.
The JavaScript Switch Statement. Use the switch statement to select one of many code blocks to be executed. Syntax. switch (expression) { case x: // code block break; case y: // code block break; default: // code block } This is how it works: The switch expression is evaluated once.
3 mar 2024 · To check if a letter in a string is uppercase or lowercase: Use the toUpperCase () method to convert the letter to uppercase. Compare the letter to itself. If the comparison returns true, the letter is uppercase, otherwise, it's lowercase. index.js.
The JavaScript switch...case statement executes different blocks of code based on the value of a given expression. Here's a simple example of the switch...case statement. You can read the rest of the tutorial for more.
5 lip 2024 · There are different ways to check the case of the letters in JavaScript which are explained below comprehensively, one can choose the method that best suits their specific use case and requirement. Table of Content. Using the function “toUpperCase ()” or “toLowerCase”. Using regular expression. Using ASCII value.
Use switch to select one of many blocks of code to be executed. This is the perfect solution for long, nested if/else statements. The switch statement evaluates an expression. The value of the expression is then compared with the values of each case in the structure.
