Numeric Fields

Keyword type	Keywords accepted	Examples
Length	mm, millimeter, cm, centimeter, m, meter, in, inch, ft, foot, yd, yard	5mm 10meters 3ft
Angle units	deg, degree, rad, radian	7deg (or 7 degree) 14rad (or 14 radian)
Math functions	+, -, *, /, ^, ceil, floor, round, exp, sqrt, abs, max, min, log, log10	2^3 abs(-4) max(2, 3) (sqrt(2in * 3mm)) and sqrt(4 in^2) exp(2) ceil(5.667) = 6 floor(5.667) = 5
Modulo operator	%	5%2 (returns 1)
Trigonometric functions	cos, sin, tan, acos, asin, atan, atan2, cosh, sinh, tanh, asinh, acosh, atanh	These functions are in degrees, not radians. For example: sin(30) = sin(30 deg) = .5 atan2(4, 5) (Give the polar angle of (5,4) in as an angle)
Constants	pi, PI, Pi	(3*pi) in

Parameter expressions are evaluated as FeatureScript.

• Parameter expressions are available in Part Studios and Assemblies.
• Parameter expressions must either result in a unitless value, or result in a unit value to the first power.
• After a numeric field has been accepted, the evaluation of the expression is displayed. When the field is active again, the original expression is displayed.
• Use any units (if the field accepts units), but don't mix types (such as degrees and millimeters):

  Valid	Invalid
  3in+2.5in	3+2.5in
  3mm+2.5in	3mm+2deg
  3+2	3in+2
  (2*3)*(1/3)	(2*3)(1/3)
  sqrt(16)m	sqrt(16m)
  cos(30deg)	30 o

• Plurals of all length and angle units are allowed (for example: feet, radians, etc.).
• Most parameters are lengths or angles. Some parameters are unitless, like Rho and pattern instance counts.
• Fractions are supported.
• Use parentheses when necessary. For example, (2*3)*(1/3).
• See Variable Studios for information on creating global variables.

For unitless expressions, all unitless expressions are accepted and follow the standard order of evaluation. For example: 3+(2*3)/6

For single-unit expressions, all single units are accepted if the expression ends with a unit to the first power. For example: 3mm+(2mm*3mm)/(6mm), and 3mm+2mm

For multiple-unit expressions, all multiple-unit expressions are accepted if the result is a unit to the first power. For example: 3[unit]+3[unit] is accepted, but 3[unit]*3[unit] is not accepted.

When creating custom features using FeatureScript, you are able to use trigonometric functions in numeric fields. Keep the following in mind:

Unitless parameters are accepted. For example: sin(30) and sin(asin(1)).

Inverse trigonometric functions are accepted. For example: atan(1), atan(1)/deg. Be aware that asin/acos/atan return a degree, so you need to divide by degree to get a unitless value.

For more information on FeatureScript, see Welcome to FeatureScript and for more information on creating custom features, see Add Custom Features.

Onshape supports array/lookup tables such as this:

[3,5,6,7][2] with:

• [3,5,6,7] being the array
• [2] being the position
• 6 being the second value in the array

Remember the array starts at position 0.

Another example is: [3,5,6,7][3]=7

You can also use ternary operators (such as '?') which may yield conditional results. For example, say the length of a sketch entity should be 7 inches if the width is greater than 5 inches. It can be written this way:

#width>5?7:4

Where:

• #width>5 is the conditional statement
• ? is the ternary operator
• 7 being if the expression is true (if the width is greater than 5), make the length 7 inches
• 4 being if the expression is false (if the width is 5 or less), make the length 4 inches

You can use logic operators, such as:

• && for 'and'

• || for 'or'

For example:

(#width > 3in && #width < 5in) ? 3 : 2

This returns 3 if the value satisfies both conditions, and otherwise returns 2.

(#width > 3in || #alwaysReinforce) ? 3 : 2

Where #alwaysReinforce is a configuration checkbox, and returns 3 if the value satisfies either condition, and otherwise returns 2.

• 3in*3in
• 3+3in (Because unitless+unit does not compute.)
• 3[unit]*3[unit] (This results in [unit]^2, which is not accepted.)
• sin(30)/deg (This results in a 1/deg unit, which is not accepted.)
• Anything resulting in 1/[unit] is not accepted.
• A unit over a unit if there is a separate unit, for example: 3[unit]+1[unit]/2[unit].

• Inverse trigonometric functions take numeric values and return angles; for example: atan(1) = 45 degrees.
• To use a unitless value (perhaps to enter into a dimension field), divide by the default angle unit; for example: [atan(1)/deg].
• Plurals of all length and angle units are allowed (for example: feet, radians, etc.).

• Use parentheses when necessary. For example, (2*3)*(1/3).

• Fractions are supported.
• Commas can be used as decimal separators in numeric value fields.
  • For information on how to apply the settings for commas as decimal separators, see the Decimal format section in Setting Preferences.
• Most parameters are lengths or angles. Some parameters are unit-less, like Rho and pattern instance counts.
• See Variable Studios for information on creating global variables.

Keyword type	Keywords accepted	Examples
Length	mm, millimeter, cm, centimeter, m, meter, in, inch, ft, foot, yd, yard	5mm 10meters 3ft
Angle units	deg, degree, rad, radian	7deg (or 7 degree) 14rad (or 14 radian)
Math functions	+, -, *, /, ^, ceil, floor, round, exp, sqrt, abs, max, min, log, log10	2^3 abs(-4) max(2, 3) (sqrt(2in * 3mm)) and sqrt(4 in^2) exp(2)
Modulo operator	%	5%2 (returns 1)
Trigonometric functions	cos, sin, tan, acos, asin, atan, atan2, cosh, sinh, tanh, asinh, acosh, atanh	These functions are in degrees, not radians. For example: sin(30) = sin(30 deg) = .5 atan2(4, 5) (Give the polar angle of (5,4) in as an angle)
Constants	pi, PI, Pi	(3*pi) in

Onshape supports array/lookup tables such as this:

[3,5,6,7][2]=6 with:

• [3,5,6,7] being the array
• [2] being the position within the array
• 6 being the value

Remember the array starts at position 0.

Another example is: [3,5,6,7][3]=7

You can also use ternary operators (such as '?') which can yield conditional results. For example, say the length of a sketch entity should be 7 inches if the width is greater than 5 inches. It can be written this way:

#width>5?7:4

Where:

• #width>5 is the conditional statement
• ? is the ternary operator
• 7 being if the expression is true (if the width is greater than 5), make the length 7 inches
• 4 being if the expression is false (if the width is 5 or less), make the length 4 inches

1. With the number pad open, tap the keyboard button.

   

   The number pad minimizes and a keyboard appears.

2. Enter an expression with the keyboard.
3. Tap the check to accept the expression or the x to cancel.

• Expressions are available in Part Studios and Assemblies.
• Expressions must either result in a unitless value, or result in a unit value to the 1st power.
• After a numeric field has been accepted, the evaluation of the expression is displayed. When the field is active again, the original expression is displayed.
• Use any units (if the field accepts units), but don't mix types (such as degrees and millimeters):

  Valid	Invalid
  3in+2.5in	3+2.5in
  3mm+2.5in	3mm+2deg
  3+2	(2*3)(1/3)
  (2*3)*(1/3)	sqrt(16m)
  sqrt(16)m	30 o
  cos(30deg)

• Plurals of all length and angle units are allowed (for example: feet, radians, etc.).
• Most parameters are lengths or angles. Some parameters are unitless, like Rho and pattern instance counts.
• Fractions are supported.
• Use parentheses when necessary. For example, (2*3)*(1/3).
• See Variable Studios for information on creating global variables.

For unitless expressions, all unitless expressions are accepted and follow the standard order of evaluation. For example: 3+(2*3)/6

For single-unit expressions, all single units are accepted if the expression ends with a unit to the first degree. For example: 3mm+(2mm*3mm)/(6mm), and 3mm+2mm

For multiple-unit expressions, all multiple-unit expressions are accepted if the result is a unit to the first degree. For example: 3[unit]+3[unit] is accepted, but 3[unit]*3[unit] is not accepted.

You can use trigonometric functions in numeric fields. Keep the following in mind:

Unitless parameters are accepted. For example: sin(30) and sin(asin(1)).

Inverse trigonometric functions are accepted. For example: atan(1), atan(1)/deg. Be aware that asin/acos/atan return a degree, so you need to divide by degree to get a unitless value.

• 3in*3in
• 3+3in (Because unitless + unit does not compute.)
• 3[unit]*3[unit] (This results in [unit]^2, which is not accepted.)
• sin(30)/deg (This results in a 1/deg unit, which is not accepted.)
• Anything resulting in 1/[unit] is not accepted.
• A unit over a unit if there is a separate unit, for example: 3[unit]+1[unit]/2[unit].

• Inverse trigonometric functions take numeric values and return angles; for example: atan(1) = 45 degrees.
• To use a unitless value (perhaps to enter into a dimension field), divide by the default angle unit; for example: [atan(1)/deg].
• Plurals of all length and angle units are allowed (for example: feet, radians, etc.).

• Use parentheses when necessary. For example, (2*3)*(1/3).

• Fractions are supported.
• Most parameters are lengths or angles. Some parameters are unitless, like Rho and pattern instance counts.
• See Variable Studios for information on creating global variables.