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Javascript calculator4/13/2023 Today, in this post, we learned how to create a very basic calculator program using JavaScript by using both the if-else statements as well as the switch statements. We use a calculator to perform numerous mathematical operations like addition, subtraction, multiplication in our daily life routine. Learning a new language requires you to build real-life applications when you are starting out with learning JavaScript, a calculator program is really useful and an easy way to get the hang of JavaScript. That is it, you have coded a simple calculator using JavaScript. Simple JavaScript Calculator A simple calculator is used to perform simple mathematical calculations like addition, subtraction, multiplication, and division. ![]() ![]() To use switch instead of if-else simple replace the if-else statements with the following lines of code:Īll that is left now is to test this code, take a look at the gif below: You can create a file in your favorite text editor (Notepad, Notepad++, Sublime Text, Visual Studio code etc.). This calculator can perform basic mathematical operations like addition, subtraction, multiplication, and division. The sample JavaScript script can be used in the Quote Line Calculator to calculate the total price for all components in a quote line and then store that value. ![]() } Step 4: Using Switch instead of if-else You can make a simple calculator using just core web technologies: HTML, CSS, and JavaScript. However, since we do not want to mix CSS classes with JavaScript classes, we can use data attributes to select them instead. ![]() We can do this by putting some classes in the HTML file. Result = parseInt (operand1 ) + parseInt (operand2 ) The actual JavaScript First, we should select all our calculator’s buttons and operations. In the above example, the user is prompted to enter an operator (either +, -, or /) and two numbers. Const operatorVar = prompt ( "Enter the operator that you want to use" ) Ĭonst operand1 = prompt ( "Enter the First Value" ) Īlert ( "Wrong input at operand 1| Not an integer Value" ) Ĭonst operand2 = prompt ( "Enter the Second Value" ) Īlert ( "Wrong input at operand 2| Not an integer Value" ) Example 1: Simple Calculator with if.else if.else.
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