// Program Title: Go Math Functions Demonstration
package main
import (
"fmt"
"math"
)
func main() {
// ============================
// Constants
// ============================
piValue := math.Pi // π constant
eValue := math.E // Euler's number
fmt.Println("Constants:")
fmt.Println(" pi =", piValue)
fmt.Println(" e =", eValue)
fmt.Println()
// ============================
// Core Functions
// ============================
numX := 2.5 // sample value
fmt.Println("Core Functions:")
fmt.Println(" sqrt(2.5) =", math.Sqrt(numX)) // square root
fmt.Println(" exp(2.5) =", math.Exp(numX)) // e^x
fmt.Println(" log(2.5) =", math.Log(numX)) // natural log
fmt.Println(" log10(2.5)=", math.Log10(numX)) // base-10 log
fmt.Println(" pow(2.5,3)=", math.Pow(numX, 3)) // x^3
fmt.Println()
// ============================
// Trigonometric Functions
// ============================
angle := math.Pi / 4 // 45 degrees in radians
fmt.Println("Trigonometric Functions:")
fmt.Println(" sin(pi/4) =", math.Sin(angle)) // sine
fmt.Println(" cos(pi/4) =", math.Cos(angle)) // cosine
fmt.Println(" tan(pi/4) =", math.Tan(angle)) // tangent
fmt.Println(" asin(0.5) =", math.Asin(0.5)) // arcsine
fmt.Println(" acos(0.5) =", math.Acos(0.5)) // arccosine
fmt.Println(" atan(1.0) =", math.Atan(1.0)) // arctangent
fmt.Println()
// ============================
// Hyperbolic Functions
// ============================
fmt.Println("Hyperbolic Functions:")
fmt.Println(" sinh(1) =", math.Sinh(1)) // hyperbolic sine
fmt.Println(" cosh(1) =", math.Cosh(1)) // hyperbolic cosine
fmt.Println(" tanh(1) =", math.Tanh(1)) // hyperbolic tangent
fmt.Println()
// ============================
// Rounding Functions
// ============================
numY := -2.7 // negative number for rounding tests
fmt.Println("Rounding Functions:")
fmt.Println(" floor(-2.7) =", math.Floor(numY)) // round down
fmt.Println(" ceil(-2.7) =", math.Ceil(numY)) // round up
fmt.Println(" round(-2.7) =", math.Round(numY)) // nearest integer
fmt.Println(" trunc(-2.7) =", math.Trunc(numY)) // remove decimals
fmt.Println()
// ============================
// Min / Max / Clamp
// ============================
numA := 10.0
numB := 20.0
valueToClamp := 15.0
fmt.Println("Min/Max/Clamp:")
fmt.Println(" min(10,20) =", math.Min(numA, numB)) // smaller of two
fmt.Println(" max(10,20) =", math.Max(numA, numB)) // larger of two
// clamp manually
clamped := math.Max(0, math.Min(10, valueToClamp)) // clamp 15 to range 0–10
fmt.Println(" clamp(15,0,10) =", clamped)
fmt.Println()
// ============================
// Bitwise Math (Integers)
// ============================
byteA := 0xAA // 10101010 in hex
byteB := 0xCC // 11001100 in hex
fmt.Println("Bitwise Math:")
fmt.Printf(" A & B = %X\n", byteA&byteB) // AND
fmt.Printf(" A | B = %X\n", byteA|byteB) // OR
fmt.Printf(" A ^ B = %X\n", byteA^byteB) // XOR
fmt.Printf(" ~A = %X\n", ^byteA&0xFF) // NOT (mask to 8 bits)
fmt.Printf(" A << 2 = %X\n", (byteA<<2)&0xFF) // left shift
fmt.Printf(" B >> 3 = %X\n", byteB>>3) // right shift
fmt.Println()
// ============================
// Additional Useful Math
// ============================
fmt.Println("Additional Math:")
fmt.Println(" abs(-3.14) =", math.Abs(-3.14)) // absolute value
fmt.Println(" mod(10,3) =", math.Mod(10, 3)) // remainder
fmt.Println(" hypot(3,4) =", math.Hypot(3, 4)) // sqrt(x²+y²)
fmt.Println(" deg2rad(180) =", 180*(math.Pi/180)) // degrees → radians
fmt.Println(" rad2deg(pi) =", math.Pi*(180/math.Pi)) // radians → degrees
}
/*
run:
Constants:
pi = 3.141592653589793
e = 2.718281828459045
Core Functions:
sqrt(2.5) = 1.5811388300841898
exp(2.5) = 12.182493960703473
log(2.5) = 0.9162907318741551
log10(2.5)= 0.3979400086720376
pow(2.5,3)= 15.625
Trigonometric Functions:
sin(pi/4) = 0.7071067811865475
cos(pi/4) = 0.7071067811865476
tan(pi/4) = 1
asin(0.5) = 0.5235987755982989
acos(0.5) = 1.0471975511965976
atan(1.0) = 0.7853981633974483
Hyperbolic Functions:
sinh(1) = 1.1752011936438014
cosh(1) = 1.5430806348152437
tanh(1) = 0.7615941559557649
Rounding Functions:
floor(-2.7) = -3
ceil(-2.7) = -2
round(-2.7) = -3
trunc(-2.7) = -2
Min/Max/Clamp:
min(10,20) = 10
max(10,20) = 20
clamp(15,0,10) = 10
Bitwise Math:
A & B = 88
A | B = EE
A ^ B = 66
~A = 55
A << 2 = A8
B >> 3 = 19
Additional Math:
abs(-3.14) = 3.14
mod(10,3) = 1
hypot(3,4) = 5
deg2rad(180) = 3.141592653589793
rad2deg(pi) = 180
*/
