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| function calculateAge(birthyear, currentyear) { | |
| var age = currentyear - birthyear; | |
| document.write("You are either " + age + " or " + (age - 1)); | |
| } | |
| function calculateAge(birthyear){ | |
| var d = new Date(); | |
| var n= d.getFullYear(); | |
| var age =n-birthyear; | |
| document.write("You are either " + age + " or " + (age-1)); | |
| } | |
| //calculateAge(1984,2017) | |
| //calculateAge(1984) | |
| //calculateAge(2000) | |
| function calculateSupply(age,amountperday) { | |
| var maxage = 80; | |
| var total = (amountperday * 365) * (maxage - age); | |
| document.write("You will need "+ Math.round(total) +" to last you until the ripe old age of "+ maxage); | |
| } | |
| //calculateSupply(23,20) | |
| //calculateSupply(25,20.25) | |
| function calcCircumfrence(radius) { | |
| var cm = Math.PI * 2*radius; | |
| document.write("The circumference is " + cm); | |
| } | |
| function calcArea(radius) { | |
| var area = Math.PI * radius*radius; | |
| document.write("The area is " + area); | |
| } | |
| //calcCircumfrence(25) | |
| //calcArea(25) | |
| function celsiusToFahrenheit(celsius){ | |
| var c=celsius; | |
| var ctof = (c*9)/5 + 32; | |
| document.write(""+ c +"°C is " + ctof+"°F"); | |
| } | |
| function fahrenheitToCelsius(fahrenheit) { | |
| var f=fahrenheit; | |
| var ftoc = ((f - 32)*5)/9; | |
| document.write(""+ f+"°F is " +ftoc+"°C"); | |
| } | |
| //celsiusToFahrenheit(10); | |
| //fahrenheitToCelsius(10); | |
| function myFunction() { | |
| var x = document.getElementById('myDIV'); | |
| if (x.style.display === 'none') { | |
| x.style.display = 'block'; | |
| } else { | |
| x.style.display = 'none'; | |
| } | |
| } |
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| <html> | |
| <style> | |
| h4 { | |
| color:red; | |
| } | |
| .red | |
| { | |
| color:green; | |
| } | |
| </style> | |
| <script type="text/javascript" src="1.js"></script> | |
| <body> | |
| <h4> THE AGE CALCULATOR </h4></br> | |
| birth year<input type="text" id="age"> | |
| current year <input type="text" id="current"> | |
| <button type="button" onclick="calculateAge(document.getElementById('age').value,document.getElementById('current').value)" style="color:blue" >compute</button><br> | |
| birth year<input type="text" id="age2"> | |
| <button type="button" onclick="calculateAge(document.getElementById('age2').value)" style="color:blue">compute</button>(auto current year is taken)<br> | |
| </br> | |
| <hr> | |
| <h4 >THE LIFETIME SUPPLY CALCULATOR</h4></br> | |
| your age<input type="text" id="ages"> | |
| amount per day <input type="text" id="amount"> | |
| <button type="button" onclick="calculateSupply(document.getElementById('ages').value,document.getElementById('amount').value)" style="color:blue">compute</button><br> | |
| </br></br> | |
| <hr> | |
| <h4 >THE GEOMETRIZER</h4></br> | |
| radius<input type="text" id="rad"> | |
| <button type="button" onclick="calcCircumfrence(document.getElementById('rad').value)" style="color:blue">circumference</button> | |
| <button type="button" onclick="calcArea(document.getElementById('rad').value)" style="color:blue"> area</button> | |
| </div> | |
| </br> | |
| </br></br> | |
| <hr> | |
| <h4 >THE TEMPERATURE CONVERTER</h4></br> | |
| <button onclick="myFunction()">click here</button> | |
| <div id="myDIV" style='display:none'> | |
| in celsius<input type="text" id="cel"> | |
| <button type="button" onclick="celsiusToFahrenheit(document.getElementById('cel').value)" style="color:blue">ctof</button><br> | |
| in Fahrenheit<input type="text" id="far"> | |
| <button type="button" onclick="fahrenheitToCelsius(document.getElementById('far').value)" style="color:blue">ftoc</button><br> | |
| </div> | |
| </body> | |
| </html> |
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