Arithmetic operation function in Delphi
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ABS CEIL Exp Floor Frac Frexp Int IntPower LDEXP MAX MINPIPOLYPOWERROUNDSQRTTRUNCSQR
Function name ABS brief introduction: Returns An Absolute Value. (Take an absolute value) Associated unit: system definition: function abs (x); Detailed explanation: abs returns the absolute value of the argument, xx is an integer-type or real-type x Expression. (ABS function is used to return the absolute value of the variable X, X can be a shaped variable or real-type variable) Return function name CEIL brief description: Rounds Variables Up Toward Positive Infinity. Site: Math Definition: Function CEIL X: Extended: Integer Detailed explanation: Call Ceil To Obtain The Lowest Integer Greater Than Or Equal To X. The Absolute Value of X Must Be Less Than Maxint. For example: ceil (-2.8) = -2ceil (2.8) = 3CEIL (-1.0) = -1 (Call the CEIL function, returning the minimum integer value greater than or equal to X. The absolute value of the x must be less than the maximum integer value. For example: ceil (-2.8) = -2ceil (2.8) = 3CEIL (- 1.0) = -1) Return to function name EXP brief introduction: Returns the exponential of x. (The EXP function returns the X Power of the natural logarithmic substrate E.) The unit: system definition: function exp (x: real): real; Detailed explanation: Exp Returns the value of e rased to the power of x, where e is the base of the Natural Logarithms. (Exp to E 's X Power Values, where E is a natural logarithmic substrate.) Example: Var
E: Real;
String;
Begin
E: = EXP (1.0);
STR (ln (e): 3: 2, s);
S: = 'E =' floattostr (e) '; ln (e) =' S;
Canvas.Textout (10, 10, s);
End; Return Function Name Floor Description: Rounds Variables Toward Negative Infinity. (Take the maximum integer of a given value) belonging: Math Definition: Function Floor (x: Extended): Integer; Detailed explanation: Call floor to Obtain the highest Integer Less Thanlet: floor (-2.8) = -3floor (2.8) = 2floor (-1.0) = -1Note: The Absolute Value of X Must Be Less Than Maxint. (using the FLOOR function to get less than Most of the maximum integer, such as floor (-2.8) = -3floor (2.8) = 2floor (-1.0) = -1 Note: The absolute value of X must be less than the maximum of the shaping number) Return to the function name FRAC brief introduction: RETURNS THE FRACTIONAL PART OF A Real Number (Returns a real number) belonging: system definition: Function Frac (x: extended): Extended; Detailed explanation: The Frac Function Returns the Fractional Part of the argument xx is a real- TYPEE RESSSITIONAL PART OF X; That IS, FRAC (X) = X - INT (X). (FRAC function returns the fractional portion of the parameter X, X is a real number, the function of the function is equivalent Example: VARA, B: REAL;
Begin
A: = 1.54;
B: = FRAC (a);
END;
At this time, a = 1.54, b = 0.54 Return Function name Frexp brief introduction: Separates The Mantissa and Exponent Of X (Decomposing the Monail and Index of X X and Index) Associated Unit: Math Definition: Procedure Frexp (x: Extended; Var Mantissa : Extended; Var Exponent: Integer Register; Detailed explanation: Frexp Returns The Mantissa of X As Mantissa and The Exponent As Exponent. (FREXP function returns the X's mantissa Mantissa and Index Variable Exponent). Return to the function name INT brief introduction: Returns the Integer Part of a real number: (Returns an integer part of a real type) belonging: system definition: function int (x: extended): extended; detailed explanation: int Returns the integer part of X; That IS, X ROUNDED TOWARD ZERO. X is a real-type expression. (INT function returns an integer portion of the parameter X, X is the real type, the function result is X through negative rounding (rounding to 0). Example: var
R: REAL;
Begin
R: = Int (123.456); {123.0}
R: = INT (-123.456); {-123.0}
END;
Return to Functions INTPOWER Description: Calculate The Integral Power of A Base Value. (Calculating the integer power of the base): Math definition: function intpower (base: extended; exponent: integer): Extended Register; detailed explanation: intPower raise Base to the power specified by Exponent (Calculating the integer power. Base) Example: Return Function Name LDEXP Description: Calculates X * (2 ** P) A unit: Math Definition: Function LDEXP (X : Extended; p: integer; extended register; Detailed explanation: LDEXP RETURns X Times (2 to the power of p) (LDEXP calculates x * (2 ** P), returns x (2 P movable) times Power.) Back to function name Max Brief introduction: Returns The Greater of Two Numeric Values. (Take the maximum value in the two numbers) belonging: Math Definition: Function Max (A, B: Integer): Integer; Overload; Function Max (A, B: INT64): INT64; OVERLOAD;
Function Max (a, b: Single): SINGLE; OVERLOAD;
Function Max (a, b: double): double; overload;
Function Max (A, B: Extended): Extended; OverLoad; Detailed explanation: Call Max to Compare Two Numeric Values. Max Returns The Greater Value of The Two. (Returns the maximum value in the two values. Call MAX compare two values It returns a larger value in both.) Return to function name MIN Brief introduction: Returns the lesser of two Numeric Values. (Take the minimum value of two) The unit: Math definition: Function min (A, B: Integer: Integer; OVERLOAD; Function Min (a, b: int64): int64; OverLoad; Function min (a, b: Single): SINGLE; OVERLOAD; Function min (a, b: double): double; OVERLOAD; Function MIN (A, B: Extended): Extended; OverLoad; Detailed explanation: Call min to compare Two Numeric Values. MIN RETURNS The Smaller Value of the Two. (Returns the minimum in the two values. Call MAX compare two values, it returns a value smaller of the two) function returns the name pi brief: returns 3.1415926535897932385 (return 3.1415926535897932385) belongs unit: System definitions: function Pi: Extended; detailed explanation:... Use Pi in mathematical calculations that require pi, the ratio of a circle's circumference to its diameter. Pi is approximated as 3.1415926535897932385. (accurate calculation using the function returns Pi Pi Pi, Pi is a value obtained by dividing the circumference of a circle to its diameter approximates 3.1415926535897932385 .Pi.) function returns the name Poly (this translation is uniform) Brief Introduction: Evaluates a Uniform Polynomial of one variable at the value X. unit belongs: Math defined: function Poly (X: Extended; const Coefficients: array of Double): Extended; Detailed Explanation: Call Poly to evaluate the polynomial represented by the Coefficients parameter at the point where the variable Equals the value of the x parameter. The Coefficients Are Ordered in Increasing Powers of x: Coefficients [0] CoeffInTicients [1] * x ... COEfficInts [n] * (x ** n) (POLY estimated a variable The X value of the same polynomial. Call Poly Evaluation The value of a polynomial that is expressed by the COEfficInts parameter is equivalent to the value of the X parameter.
The parameter is the order of X-shi: COEfficients [0] Coefficients [1] * x ... .. COFFICIENTS [N] * [x ** n]) Return Function Name Power Profile: rases base to any poter. (Take a real power) Associated unit: Math definition: function power (base, exponent: Extended): Extended; Detailed explanation: Power Raises base to any power. For Fractional Exponents or Exponents Greater Than Maxint, Base Must Be Greater Than 0 (Returns a real power. When the index exponent is a decimal or greater than maxint, the base base must be greater than 0.) Return to the function name Rounded: returns the value of x rounded to the nearest Whole Number. (20 rounds to a real number ) The unit: system definition: Function Round (x: extended): int64; Detailed explanation: The Round Function Rounds a real-type value to an integer-type value.x is a real-type expression. Round Returns an Int64 Value That is the value of X rounded to the nearest whole number. If X is exactly halfway between two whole numbers, the result is always the even number.If the rounded value of X is not within the Int64 range, a run-time error is generated Which can be handled using the einvalidop exception. (Round Returns the rounding of the nearest integer value. The function rounds a real value into a full value .x is a real expression .Round returns a long integer The value is the nearest integer value. If x It is the middle of the two integer values, the result is one of the absolute values. If the rounding value of X is not in a long integer range, a runtime error will be generated, you can use the einvalidop exception to handle the example: Vars, T: string;
Begin
STR (1.4: 2: 1, t);
S: = T 'ROUNDS to' INTOSTR (Round (1.4)) # 13 # 10;
STR (1.5: 2: 1, t);
S: = S T 'ROUNDS to' INTSTR (Round (1.5)) # 13 # 10;
STR (-1.4: 2: 1, t);
S: = S T 'ROUNDS to' INTOSTR (Round (-1.4)) # 13 # 10;
STR (-1.5: 2: 1, t);
S: = S T 'ROUNDS to' INTTOSTR (Round (-1.5));
Messagedlg (s, mtinformation, [mbok], 0);
End; return function name SQR brief introduction: returns the Square of a number. (Part of the value) belonging: system definition: function sqr (x: extended): Extended; Detailed explanation: The SQR Function Returns the Square of The argument.x is a floating-point expression. The result, of the same type as x, is the Square of x, or x * x. (SQR returns x to square value, x is a floating point number, return The value of the value is the same, the value is x * x) Example: Var S, Temp: string; Begin Str (SQR (5.0): 3: 1, TEMP); s: = '5 squared is' TEMP # 13 # 10; STR (SQRT (2.0): 5: 4, TEMP); S: = S 'The Square Root of 2 IS' TEMP; Messagedlg (S, Mtinformation, [Mbok], 0); END; Return Function Name SQRT brief introduction: Returns the Square root of x. Configuration: system definition: function sqrt (x: extended): Extended; Detailed explanation: x is a floating-point expression. The result is the square root of x. (Take X is a square root, X is a floating point number, return value is also a floating point number) Example: var s, temp: string; begin Str (SQR (5.0): 3: 1, TEMP); s: = '5 squares is' Temp # 13 # 10; STR (SQRT (2.0): 5: 4, TEMP); s: = S 'The Square Root of 2 IS' TEMP; Messagedlg (S, Mtinformation, [Mbok], 0); End; return function name Trunc brief introduction: truncates a real number to an integer. (intercept one A university integer part) The unit: system definition: function trunc (x: extended): int64; Detailed explanation: The Trunc Function Truncates a real-type value to an integer-type value. X is a real-type expression. Trunc Returns an int64 value this is the value of x runcate value of x is not with the int64 range, an einvalidop exception is ras: var s, t: string; begin Str (1.4: 2: 1 , T); s: = t 'truncs to' INTOSTR (Trunc (1.4)) # 13 # 10; STR (1.5: 2: 1, t); s: = S T 'Truncs to'
