1var ceiling1 = Math.ceil(4.7); //5 
2var ceiling2 = Math.ceil(-3.4); //-3

1Math.ceil(1.2);
2// 2

1//The Math.ceil() function always rounds a
2//number up to the next largest integer.
3
4//Note: Math.ceil(null) returns integer 0
5//and does not give a NaN error.
6
7Math.ceil(.95);    // 1
8Math.ceil(4);      // 4
9Math.ceil(7.004);  // 8
10Math.ceil(-0.95);  // -0
11Math.ceil(-4);     // -4
12Math.ceil(-7.004); // -7
13

1Math.ceil(x); //This equals the next whole number after x. X must be a double.
2
3//Example use:
4x = Math.ceil(x);
5//Now x is equal to x rounded up.

1Math.ceil(.95);    // 1
2Math.ceil(4);      // 4
3Math.ceil(7.004);  // 8
4Math.ceil(-0.95);  // -0
5Math.ceil(-4);     // -4
6Math.ceil(-7.004); // -7
7

1Math.ceil()