bits.Len64() Function in Golang with Examples

bits.Mul64() Function in Golang with Examples

Last Updated : 28 Apr, 2020

bits.Mul64() Function in Golang is used to find the 128-bit product of x and y. The execution time of this function does not depend on the inputs. To access this function, one needs to imports the math/bits package in the program. Syntax:

func Mul64(x, y uint64) (hi, lo uint64)

Parameters: This function takes two parameter of uint64 type, i.e., x, y. Note: (hi, lo) = x * y Here, hi is the product bits’ upper half and, lo is the lower half returned. Return Value: This function returns the 128-bit product of x and y. Example 1:

C

// Golang program to illustrate 
// bits.Mul64() Function 
package main 
   
import ( 
    "fmt"
    "math/bits"
) 
   
// Main function 
func main() { 
   
    // Using Mul64() function 
    hi, lo  := bits.Mul64(15, 25) 
    fmt.Println("128-bit product of x and y : ", hi, lo) 
   
}

Output:

128-bit product of x and y :  0 375

Example 2:

C

// Golang program to illustrate 
// bits.Mul64() Function 
package main 
   
import ( 
    "fmt"
    "math/bits"
) 
   
// Main function 
func main() { 
   
    // Using Mul64() function 
    const a, b = 10, 30
    hi, lo  := bits.Mul64(a, b) 
    fmt.Println("Number 1:", a) 
    fmt.Println("Number 2:", b) 
    fmt.Println("Upper half:", hi) 
    fmt.Println("Lower half:", lo)  
   
}

Output:

Number 1: 10
Number 2: 30
Upper half: 0
Lower half: 300

bits.Len64() Function in Golang with Examples

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