Generate n ~ Random Number of m

Generate N-M, which contains N but does not contain an integer of M:

The first step is to calculate the M-N value, assuming that it is equal to W

Step 2 math. Random () * w

Step 3 math. Random () * w + n

Step 4 parseint (math. Random () * w + N, 10)

Generate N-M, which does not contain N but contains an integer of M :?

The first step is to calculate the M-N value, assuming that it is equal to W

Step 2 math. Random () * w

Step 3 math. Random () * w + n

Step 4 math. Floor (math. Random () * w + n) + 1

Generate N-M, excluding Integers of N and M:

The first step is to calculate the value of the m-n-2, assuming that it is equal to W

Step 2 math. Random () * w

Step 3 math. Random () * w + n + 1

Step 4 math. Round (math. Random () * w + n + 1) or math. Ceil (math. Random () * w + n + 1)

Generate a random number of N-m, including N and M:

The first step is to calculate the M-N value, assuming that it is equal to W

Step 2 math. Random () * w

Step 3 math. Random () * w + n

Step 4 math. Round (math. Random () * w + n) or math. Ceil (math. Random () * w + n)

 

Example:

Generate a random integer of 800 to 1500, including, but not

1. 1500-800 = 700
2. Math. Random () * 700
3. VaR num = math. Random () * 700 + 800;
4. Num = parseint (Num, 10 );

Only four simple steps are required.

 

Supplement:

Math. Ceil () returns the smallest integer greater than or equal to the number parameter (take the entire function), rounded up the number

Math. Floor () returns the largest integer smaller than or equal to the number parameter, and homes the number

Math. Round () returns the nearest integer to the number, rounding

 

Generate n ~ Random Number of m