javascript - How would I go about separating numbers in a string and making them their own values? -
i'm making program user enters fraction, javascript code figure out percentage of given fraction.
for example, figure enter 2/4, program return 50%.
i'm wondering if there's function in javascript separate numerator , denominator given value , make them own separate values. here's code far:
html:
<!doctype html> <html> <head> <title>percentage finder javascript</title> <link rel="stylesheet" href="styles/index.css" /> </head> <body> <h1 id="head">enter fraction:</h1> <form> <input id="fraction" autofocus="on" placeholder="i.e: 1/4"></input> <input type="submit" id="sbmt"></input> </form> </body> <script src="scripts/js/index.js" type="text/javascript"></script> </html> javascript:
document.getelementbyid('sbmt').onclick = function() { var x = document.getelementbyid('fraction').value; }
assuming user gives input value_1 / value_2, without parentheses, multiplication signs etc...:
document.getelementbyid('sbmt').onclick = function() { var value = document.getelementbyid('fraction').value; var array = value.split(/\//); var = +array[0]; var b = +array[1]; var result = 100 * (a / b) + '%'; // or 100 * / b } es6:
document.getelementbyid('sbmt').onclick = function() { const value = document.getelementbyid('fraction').value; const [a, b] = value.split(/\//).map(x => +x); const result = 100 * (a / b) + '%'; // or 100 * / b }
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