4.9.1.4 ceiling - ceil( x )

The ceil function - ceil stands for ceiling - rounds the argument always up. This means that the function returns always the next higher integer value for any given argument with a negative or positive floating point value - e.g. the argument 2.1 will be rounded up and the function will return 3. If the argument is -2.1 the function will return -2 because it is the next integer with a higher value than -2.1.

sphere.YPosition = ceil( sin( time * 90 ) * 2 );

This will round up all floating point values of the wave and return stairsteps:

Since the ceil function rounds up the values of the sine curve we don't get a smooth transition anymore but abrupt shifts between single integers.

The red curve represents the values of the argument. The blue curve represents the output of the ceil function.