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30 common tools (2)

2020-12-07 14:41:14 SSS soars thousands of miles

Math Mathematical tools ( Method is a static method )

1 Rounding up ( Find a number larger than it recently ):ceil( The ceiling )

 System.out.println(Math.ceil(7.1));
 // The return value is double type 

2 Rounding down ( Find the nearest number smaller than it ):floor( The floor )

 System.out.println(Math.floor(5.1));
 // The return value is double type 

3 rounding :round

 System.out.print(Math.round(5.1));
 System.out.print(Math.round(6.6));
 // The return value is double type `

4 0-1 Random number between ( decimal ):random

 System.out.print(Math.random());
 // The return value is double type 

5 Maximum :max

 System.out.print(Math.max(5,1));
 // The return value is the largest type of input arguments 

6 minimum value min

System.out.print(Math.min(5,33.4));
// The return value is the largest type of input arguments ( Such as int,double The return is double)

7 n Of m Power

System.out.print(Math.pow(5,2));
// The formal parameter is double type , Yes, it's not double type , Because automatic type conversion 
// The return value is double type 
// Returns the value of the second power of the first parameter 

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