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Not all numbers are as simple as integers. We often need to keep track of fractional values, like product that costs $1.99 or a distance like 2.5 miles. Those values are called floats, floating point values, real numbers or doubles: all names for the same thing. For decimal numbers we use the PHP variable type of Float.
Documentation
floats also known as " Floating point numbers", "doubles", or "real numbers", can be specified using any of the following syntaxes:
$a = 1.234;
$b = 1.2e3;
$c = 7E10;

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Not all numbers are as simple as integers.

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We often need to keep track of fractional values like products that cost $1.99,

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or distance like 2.5 miles.

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Those values are called floats.

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Floating point integers, real numbers or doubles, all names for the same thing.

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For decimal numbers we use the PHP variable type float.

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Let's start by commenting out these var dumps.

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Now let's say we want to find the distance of a trip.

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So we'll create two variables here, distance home and distance to work.

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Distance_home, we'll set this equal to a floating point and number.

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We simply set this variable equal to 1.2.

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Enclose the statement with a semi colon.

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Then we'll add our second floating point variable distance to work.

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And will set this equal to 2.5.

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Again ending with a semicolon.

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Now we can use the same type of operations we've done before.

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Let's do a var dump, and we'll dump

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the distance home plus the distance to work.

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All right, now let's save and

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run our script AS you can see we can take floating point numbers and

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add them together and get returned a floating point value.

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Now what if I were to add a non floating point number to this equation.

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So let's say we'll and the variable num 3.

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Number three is a whole number.

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So let's save this script and run it again.

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Now we see 6.7.

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So if we take whole numbers and we sum them to floating point numbers

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we're still going to get a floating point in return.

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Let's add one more floating point number to make our results a whole number.

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Let's add 0.3.

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Again, run the script and

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we see the results of seven, but the type is still a float.

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Any time we're using a floating point value the result will be a float as well.

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Most of the time,

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you won't need to worry about defining a variable as an integer or a float.

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PHP automatically handles the differences, so you don't have to.
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