How to input two numbers and sum them in javascript

Implementation steps: 1. Define two variables to store the numbers entered by the user, with the syntax "var num1,num2;"; 2. Use the prompt() function to obtain the numbers entered by the user and assign them to the two Variable, syntax "num1 = prompt('Please enter the first number') * 1; num2 = prompt('Please enter the second number') * 1;"; 3. Use the " " operator to combine the two values ​​entered by the user. To add up numbers, the syntax is "num1 num2".

The operating environment of this tutorial: windows7 system, javascript version 1.8.5, Dell G3 computer.

In javascript, you can use the prompt() function and the " " operator to input two numbers and sum them.

Implementation steps:

Step 1: Define two variables to store the numbers entered by the user

var num1,num2;

Step 2: Use the prompt() function to obtain the number entered by the user and assign it to two variables

The prompt() method is used to display a dialog box that prompts the user for input. The function return value is a string.

When the user input is a number or Boolean type, string type will always be returned. If you want to keep the type unchanged, you need to perform type conversion.

num1 = prompt('请输入第一个数字') * 1;
num2 = prompt('请输入第二个数字') * 1;

Step 3: Use the " " operator to add the two numbers entered by the user

num1+ num2

Implementation code:

var num1 = prompt('请输入第一个数字') * 1;
var num2 = prompt('请输入第二个数字') * 1;
console.log("两个数字相加的和为："+(num1 + num2));

【Related recommendations: javascript video tutorial, Basic programming video】

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