# Ceil, floo, and round functions in php

Source: Internet
Author: User
Tags rounds
Ceil is a function for getting a value from the up position; floor is a function for rounding out the decimal places to get a value; round is a function for rounding out. Ceil definition and usage: The ceil () function rounds up to the nearest integer. [Php] ceil (x); description: return the next... "/> <scripttype =" text/javascript"

Ceil is a function that returns a value in the ascending order;

Floor is a function used to remove the decimal places to get a value;

Round is a rounding function.

Ceil
Definition and usage:

The ceil () function rounds up to the nearest integer.

[Php]
Ceil (x );

Ceil (x );
Note:

Returns the next integer of no less than x. If x has a decimal part, the return value is one digit.

The type returned by ceil () is still float.

Example:

[Php]
Echo ceil (1, 0.60 );
Echo"
";
Echo ceil (1, 0.40 );
Echo"
";
Echo ceil (5 );
Echo"
";
Echo ceil (1, 5.1 );
Echo"
";
Echo ceil (-5.1 );
Echo"
";
Echo ceil (-5.9 );
?>

Echo ceil (1, 0.60 );
Echo"
";
Echo ceil (1, 0.40 );
Echo"
";
Echo ceil (5 );
Echo"
";
Echo ceil (1, 5.1 );
Echo"
";
Echo ceil (-5.1 );
Echo"
";
Echo ceil (-5.9 );
?>
Output:

[Php]
1
1
5
6
-5
-5

1
1
5
6
-5
-5

Floor
Definition and usage:

The floor () function rounds down to the nearest integer.

[Php]
Floor (x );

Floor (x );
Note:

Returns the next integer not greater than x and rounds the decimal part of x.

The returned type of floor () is still float.

Example:

[Php]
Echo (floor (0.60 ));
Echo"
";
Echo (floor (0.40 ));
Echo"
";
Echo (floor (5 ));
Echo"
";
Echo"
";
Echo (floor (5.1 ));
Echo"
";
Echo (floor (-5.1 ));
Echo"
";
Echo (floor (-1, 5.9 ))
?>

Echo (floor (0.60 ));
Echo"
";
Echo (floor (0.40 ));
Echo"
";
Echo (floor (5 ));
Echo"
";
Echo"
";
Echo (floor (5.1 ));
Echo"
";
Echo (floor (-5.1 ));
Echo"
";
Echo (floor (-1, 5.9 ))
?>

Output:

[Php]
0
0
5
5
-6
-6

0
0
5
5
-6
-6
Round
Definition and usage

The round () function rounds a floating point number.

[Php]
Round (x, prec );

Round (x, prec );

Where

X (optional) specifies the number to be rounded.

Prec (optional) specifies the number of digits after the decimal point.

Note:

Returns the result of rounding x to the specified precision prec (number of digits after decimal point.

Prec can also be a negative number or zero (default ).

Example:

[Php]
Echo round (12.345,-1 );
Echo"
";
Echo round (12.345 );
Echo"
";
Echo round (0.5 );
Echo"
";
Echo round (0.4 );
Echo"
";
Echo round (-0.5 );
Echo"
";
Echo round (-0.4 );
?>

Echo round (12.345,-1 );
Echo"
";
Echo round (12.345 );
Echo"
";
Echo round (0.5 );
Echo"
";
Echo round (0.4 );
Echo"
";
Echo round (-0.5 );
Echo"
";
Echo round (-0.4 );
?>
Output:

[Php]
10
12
1
0
-1
-0

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