js to string to int code example

Example 1: how to convert string to int js

let string = "1";
let num = parseInt(string);
//num will equal 1 as a int

Example 2: how to change a string to number in javascript

let theInt = parseInt("5.90123"); //5
let theFloat = parseFloat("5.90123"); //5.90123

Example 3: javascript convert string to number

var myInt = parseInt("10.256"); //10
var myFloat = parseFloat("10.256"); //10.256

Example 4: string to int javascript

// Convert strings
Number('123'); // returns 123
Number('12.3'); // returns 12.3
Number('3.14someRandomStuff'); // returns NaN
Number('42px'); // returns NaN

Example 5: how to take value from html text box using parseint javascript

<!-- GET VALUE/INTEGER FROM HTML TEXTBOX/<INPUT> -->

<!-- First set up your input box within the <body> tag -->
<input id="example"> <!-- you are able to set the id to whatever you like,
						just make sure it is unique to your page and is
						understandable -->

<script> <!-- Use this tag within the body to write javascript in -->
  
</script>

<!-- Inside the script tag, use parseInt() to grab value and assign it 
to a variable to use later -->
<script>
  var examplevar = parseInt(document.getElementById("example").value);
</script>
<!-- Make sure to set the identifier/id of the .geteElementBy tag to the id of
the textbox you want to grab the value from, or else it will result in
 an error message. -->

<!-- You now have a variable that can be used for math equations in 
javascript -->

Example 6: string to int js

string to int js

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