To add two numbers in JavaScript, you can use the + operator. This operator is used for both addition and concatenation (joining strings together). In the case of adding numbers, the + operator will perform arithmetic addition.
Here’s an example of how to add two numbers in JavaScript:
[dm_code_snippet background=”yes” background-mobile=”yes” slim=”no” line-numbers=”no” bg-color=”#abb8c3″ theme=”dark” language=”php” wrapped=”no” height=”” copy-text=”Copy Code” copy-confirmed=”Copied”]
let num1 = 5; let num2 = 10; let sum = num1 + num2; console.log(sum); // Output: 15
[/dm_code_snippet]
In this example, we have two variables num1 and num2 which hold the values 5 and 10, respectively. We use the + operator to add these two numbers together and store the result in a new variable called sum. Finally, we log the value of sum to the console using the console.log() function.
You can also use the += operator to add a number to a variable and reassign the result to the same variable. For example:
[dm_code_snippet background=”yes” background-mobile=”yes” slim=”no” line-numbers=”no” bg-color=”#abb8c3″ theme=”dark” language=”php” wrapped=”no” height=”” copy-text=”Copy Code” copy-confirmed=”Copied”]
let num = 5; num += 10; // num is now 15
[/dm_code_snippet]
This is equivalent to:
[dm_code_snippet background=”yes” background-mobile=”yes” slim=”no” line-numbers=”no” bg-color=”#abb8c3″ theme=”dark” language=”php” wrapped=”no” height=”” copy-text=”Copy Code” copy-confirmed=”Copied”]
let num = 5; num = num + 10; // num is now 15
[/dm_code_snippet]
You can also use the - operator to subtract one number from another. For example:
[dm_code_snippet background=”yes” background-mobile=”yes” slim=”no” line-numbers=”no” bg-color=”#abb8c3″ theme=”dark” language=”php” wrapped=”no” height=”” copy-text=”Copy Code” copy-confirmed=”Copied”]
let num1 = 10; let num2 = 5; let difference = num1 - num2; console.log(difference); // Output: 5
[/dm_code_snippet]
You can also use the * operator to multiply two numbers and the / operator to divide two numbers.
[dm_code_snippet background=”yes” background-mobile=”yes” slim=”no” line-numbers=”no” bg-color=”#abb8c3″ theme=”dark” language=”php” wrapped=”no” height=”” copy-text=”Copy Code” copy-confirmed=”Copied”]
let num1 = 10; let num2 = 5; let product = num1 * num2; console.log(product); // Output: 50 let quotient = num1 / num2; console.log(quotient); // Output: 2
[/dm_code_snippet]
Here are a few additional points to consider when working with numbers in JavaScript:
- If you want to round a number to the nearest whole number, you can use the
Math.round()function. For example:[dm_code_snippet background=”yes” background-mobile=”yes” slim=”no” line-numbers=”no” bg-color=”#abb8c3″ theme=”dark” language=”php” wrapped=”no” height=”” copy-text=”Copy Code” copy-confirmed=”Copied”]
let num = 5.6; let roundedNum = Math.round(num); console.log(roundedNum); // Output: 6
[/dm_code_snippet]
- If you want to round a number up or down to the nearest whole number, you can use the
Math.ceil()andMath.floor()functions, respectively. For example:[dm_code_snippet background=”yes” background-mobile=”yes” slim=”no” line-numbers=”no” bg-color=”#abb8c3″ theme=”dark” language=”php” wrapped=”no” height=”” copy-text=”Copy Code” copy-confirmed=”Copied”]
let num = 5.6; let roundedUp = Math.ceil(num); console.log(roundedUp); // Output: 6 let roundedDown = Math.floor(num); console.log(roundedDown); // Output: 5
[/dm_code_snippet]
- If you want to find the absolute value of a number (i.e., the positive version of the number), you can use the
Math.abs()function. For example:[dm_code_snippet background=”yes” background-mobile=”yes” slim=”no” line-numbers=”no” bg-color=”#abb8c3″ theme=”dark” language=”php” wrapped=”no” height=”” copy-text=”Copy Code” copy-confirmed=”Copied”]
let num = -5; let absoluteValue = Math.abs(num); console.log(absoluteValue); // Output: 5
[/dm_code_snippet]
- If you want to find the maximum or minimum of two or more numbers, you can use the
Math.max()andMath.min()functions, respectively. For example:[dm_code_snippet background=”yes” background-mobile=”yes” slim=”no” line-numbers=”no” bg-color=”#abb8c3″ theme=”dark” language=”php” wrapped=”no” height=”” copy-text=”Copy Code” copy-confirmed=”Copied”]
let num1 = 10; let num2 = 5; let max = Math.max(num1, num2); console.log(max); // Output: 10 let min = Math.min(num1, num2); console.log(min); // Output: 5
[/dm_code_snippet]
