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The AutoLisp Intermediate Tutorial

Conversion Functions:

fix   float    itoa   atoi   atof   rtos   angtos

fix - This function returns an integer.   (NOTE: This function does not round numbers off!)

            Syntax : (fix number)

            number - any valid number.[integer or real number]

                 (fix 345) returns 345

                 (fix 345.9) returns 345

                 (fix -345) returns -345

                 (fix -345.9) returns -345

                 (fix "345JEFF") returns "Error: Bad Argument Type"   ["345JEFF" is a string, not a number]

float - This function returns a real number.

            Syntax : (float number)

            number - any valid number.[integer or real number]

                 (float 345) returns 345.0

                 (float 345.9) returns 345.9

                 (float -345) returns -345.0

                 (float -345.9) returns -345.9

                 (float "345JEFF") returns "Error: Bad Argument Type"   ["345JEFF" is a string, not a number]

itoa - This function changes an integer to a string.

            Syntax : (itoa integer)

            integer - any valid integer.

                 (itoa 345) returns "345"

                 (itoa 345.9) returns "Error: Bad Argument Type"   [345.9 is a real number, not an integer]

                 (itoa -345) returns "-345"

                 (itoa -345.9) returns "Error: Bad Argument Type"   [-345.9 is a real number, not an integer]

                 (itoa "345JEFF") returns "Error: Bad Argument Type"   ["345JEFF" is a string, not an integer]

atoi - This function changes a string into an integer.

            Syntax : (atoi string)

            string - any valid string.

                 (atoi "345") returns 345

                 (atoi "345.9") returns 345

                 (atoi 345) returns "Error: Bad Argument Type"   [345 is a number, not a string]

                 (atoi 345.9) returns "Error: Bad Argument Type"   [345.9 is a number, not a string]

                 (atoi "-345") returns -345

                 (atoi "-345.9") returns -345

                 (atoi "345JEFF49") returns 345

                 (atoi "JEFF49") returns 0

Note: This function starts at the beginning of the string and continues until it finds a character that cannot be an integer.

atof -  This function changes a string into a real number.

            Syntax : (atof string)

            string - any valid string.

                 (atof "345") returns 345.0

                 (atof "345.9") returns 345.9

                 (atof 345) returns "Error: Bad Argument Type"   [345 is a number, not a string]

                 (atof 345.9) returns "Error: Bad Argument Type"   [345.9 is a number, not a string]

                 (atof "-345") returns -345.0

                 (atof "-345.9") returns -345.9

                 (atof "345JEFF49") returns 345.0

                 (atof "JEFF49") returns 0.0

Note: This function starts at the beginning of the string and continues until it finds a character that cannot be a number.

rtos - This function converts numbers to a formatted string representing a distance.

          Syntax : (rtos number mode precision) 

          number - Any valid number.  [Real or Integer]

          mode - This directly corresponds to LUnits system variable.

         precision - This directly corresponds to the LUPrec system variable.

                       mode = 1 = Scientific

                                     with precision = 1  (rtos 456.5 1 1) returns "4.6E+02"

                                     with precision = 2  (rtos 456.5 1 2) returns "4.57E+02"

                                     with precision = 3  (rtos 456.5 1 3) returns "4.565E+02"

                                     with precision = 4  (rtos 456.5 1 4) returns "4.5650E+02"

                                     with precision = 5  (rtos 456.5 1 5) returns "4.56500E+02"

                                     with precision = 6  (rtos 456.5 1 6) returns "4.565000E+02"

                                     with precision = 7  (rtos 456.5 1 7) returns "4.5650000E+02"

                                                                 ect.....

                        mode = 2 = Engineering  

                                     with precision = 1  (rtos 456.5 2 1) returns "456.5"

                                     with precision = 2  (rtos 456.5 2 2) returns "456.50"

                                     with precision = 3  (rtos 456.5 2 3) returns "456.500"

                                     with precision = 4  (rtos 456.5 2 4) returns "456.5000"

                                     with precision = 5  (rtos 456.5 2 5) returns "456.50000"

                                     with precision = 6  (rtos 456.5 2 6) returns "456.500000"

                                     with precision = 7  (rtos 456.5 2 7) returns "456.5000000"

                                                            ect.....

                         mode = 3 = Decimal           

                                     with precision = 1  (rtos 456.5 3 1) returns "38'-0.5""

                                     with precision = 2  (rtos 456.5 3 2) returns "38'-0.50""

                                     with precision = 3  (rtos 456.5 3 3) returns "38'-0.500""

                                     with precision = 4  (rtos 456.5 3 4) returns "38'-0.5000""

                                     with precision = 5  (rtos 456.5 3 5) returns "38'-0.50000""

                                     with precision = 6  (rtos 456.5 3 6) returns "38'-0.500000""

                                     with precision = 7  (rtos 456.5 3 7) returns "38'-0.5000000"

                            ect.....   

                          mode = 4 = Architectural    

                                     with precision = 1  (rtos 37.7071 4 1) returns "3'-1 1/2""

                                     with precision = 2  (rtos 37.7071 4 2) returns "3'-1 3/4""

                                     with precision = 3  (rtos 37.9 4 3) returns "3'-1 7/8""

                                     with precision = 4  (rtos 37.7071 4 4) returns "3'-1 11/16""

                                     with precision = 5  (rtos 37.7071 4 5) returns "3'-1 23/32""

                                     with precision = 6  (rtos 37.7071 4 6) returns "3'-1 45/64""

                                     with precision = 7  (rtos 37.7071 4 7) returns "3'-1 91/128""

                                                              ect.....

                          mode = 5 = Inch Fractional 

                                     with precision = 1  (rtos 37.7071 5 1) returns "371/2""

                                     with precision = 2  (rtos 37.7071 5 2) returns "37 3/4""

                                     with precision = 3  (rtos 37.9 5 3) returns "37 7/8""

                                     with precision = 4  (rtos 37.7071 5 4) returns "37 11/16""

                                     with precision = 5  (rtos 37.7071 5 5) returns "37 23/32""

                                     with precision = 6  (rtos 37.7071 5 6) returns "37 45/64""

                                     with precision = 7  (rtos 37.7071 5 7) returns "37 91/128""

                                                              ect.....

angtos - This function converts a number to a formatted string representing an angle.

          Syntax : (angtos number mode precision) 

          number - Any valid number representing radians. [3.14159 radians = pi =180 degrees]

          mode - This directly corresponds to AUnits system variable.

         precision - This directly corresponds to the AUPrec system variable.

                       mode = 0 = Decimal Degrees

                                     with precision = 1  (angtos 0.627102 0 1) returns "35.9"

                                     with precision = 2  (angtos 0.627102 0 2) returns "35.93"

                                     with precision = 3  (angtos 0.627102 0 3) returns "35.930"

                                     with precision = 4  (angtos 0.627102 0 4) returns "35.9303"

                                     with precision = 5  (angtos 0.627102 0 5) returns "35.93030"

                                                              ect.....

                       mode = 1 = Degrees Minutes Seconds

                                     with precision = 1  (angtos 0.627102 1 1) returns " 35d56' "

                                     with precision = 3  (angtos 0.627102 1 3) returns " 35d55'49" "

                                     with precision = 5  (angtos 0.627102 1 4) returns " 35d55'49.1" "

                                     with precision = 6  (angtos 0.627102 1 5) returns " 35d55'49.07" "

                                     with precision = 7  (angtos 0.627102 1 6) returns " 35d55'49.073" "

                                                              ect.....

                       mode = 2 = Grads

                                     with precision = 1  (angtos 0.627102 2 1) returns "39.9g"

                                     with precision = 2  (angtos 0.627102 2 2) returns "39.92g"

                                     with precision = 3  (angtos 0.627102 2 3) returns "39.923g"

                                     with precision = 4  (angtos 0.627102 2 4) returns "39.9226g"

                                     with precision = 5  (angtos 0.627102 2 5) returns "39.92255g"

                                                              ect.....

                       mode = 3 = Radians

                                     with precision = 1  (angtos 0.627102 3 1) returns "0.6r"

                                     with precision = 2  (angtos 0.627102 3 2) returns "0.63r"

                                     with precision = 3  (angtos 0.627102 3 3) returns "0.627r"

                                     with precision = 4  (angtos 0.627102 3 4) returns "0.6271r"

                                     with precision = 5  (angtos 0.627102 3 5) returns "0.62710r"

                                                              ect.....

                       mode = 4 = Surveyor

                                     with precision = 1  (angtos 0.627102 0 1) returns "N 54d4' E"

                                     with precision = 2  (angtos 0.627102 0 2) returns "N 54d4' E"

                                     with precision = 3  (angtos 0.627102 0 3) returns "N 54d4'11" E"

                                     with precision = 4  (angtos 0.627102 0 4) returns "N 54d4'11" E"

                                     with precision = 5  (angtos 0.627102 0 5) returns "N 54d4'10.9" E"

                                                              ect.....

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Last Updated May 1st, 2013

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