|
Calculators >>>
Here is a really simple JavaScript calculator - with just 5 functions! (Add, subtract, multiply, divide, and power) This example can help you see how JavaScript evaluates math functions! Check it out!
Add the below code to the <body> section of your page:
<script
language="javascript"
type="text/javascript">
function
a_plus_b(form)
{
a=eval(form.a.value)
b=eval(form.b.value)
c=a+b
form.ans.value
=
c
}
function
a_minus_b(form)
{
a=eval(form.a.value)
b=eval(form.b.value)
c=a-b
form.ans.value=c
}
function
a_times_b(form)
{
a=eval(form.a.value)
b=eval(form.b.value)
c=a*b
form.ans.value=c
}
function
a_div_b(form)
{
a=eval(form.a.value)
b=eval(form.b.value)
c=a/b
form.ans.value
=
c
}
function
a_pow_b(form)
{
a=eval(form.a.value)
b=eval(form.b.value)
c=Math.pow(a,
b)
form.ans.value
=
c
}
</script>
<center>
<FORM
name="formx"><input
type=text
size=4
value=12
name="a">
<input
type="button"
value="
+ "
onClick="a_plus_b(this.form)">
<input
type="button"
value="
- "
onClick="a_minus_b(this.form)">
<input
type="button"
value="
x "
onClick="a_times_b(this.form)">
<input
type="button"
value="
/ "
onClick="a_div_b(this.form)">
<input
type="button"
value="
^ "
onClick="a_pow_b(this.form)">
<input
type="number"
size=4
value=3
name="b">
= <input
type
"number"
value=0
name="ans"
size=9>
</FORM>
</center>
|
|
