Lösung des Problems
Der folgende Code erfüllt Ihre Anforderungen.
var first = prompt("Enter a first number");
var second = prompt("Enter a second number");
var firstdc = Number(first);
var seconddc = Number(second);
var ope = prompt("Enter an operation to perform, like + - * /");
if(ope == "+" ) {
var addition = firstdc + seconddc;
alert("The addition of " + firstdc +" and " + seconddc + " is = " + addition);
} else {
alert("Couldn't get the operator!");
}
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