C + + Common functions

Name of function	Format	Function description	Example
Absolute value function	ABS (x)	Find the absolute value of a number X	ABS (-5) =5
Natural number exponential function	EXP (x)	Natural index ex with realistic number X	EXP (1) =2.718282
Rounding down	Floor (x)	Maximum integer not greater than real X	Floor (3.14) =3
Rounding up	Ceil (x)	Minimum integer not less than real X	Ceil (3.14) =4
Natural logarithm function	Log (x)	The natural number logarithm of the realistic number X	Log (1) =0
exponential function	Pow (x, y)	Computes XY with the result of a double-precision real number	Pow (2,3) =8
Random function	RAND ()	Generates a random integer between 0 and Rand-max
Square Root Value function	sqrt (x)	The square root of truth-seeking number X	sqrt (25) =5

C + + Common functions