| Function | Syntax | Result |
|---|
| Absolute value | abs({num}) | {if(is_numeric(num),abs(num),'')} |
| Arc cosine | acos({num}) | {if(is_numeric(num),acos(num),'')} |
| Arc sine | asin({num}) | {if(is_numeric(num),asin(num),'')} |
| Arc tangent of two variables | atan2({num},{num2}) | {if(is_numeric(num) && is_numeric(num2),atan2(num,num2),'')} |
| Arc tangent | atan({num}) | {if(is_numeric(num),atan(num),'')} |
| Round fractions up | ceil({num}) | {if(is_numeric(num),ceil(num),'')} |
| Cosine | cos({num}) | {if(is_numeric(num),cos(num),'')} |
| Calculates the exponent of e | exp({num}) | {if(is_numeric(num),exp(num),'')} |
| Round fractions down | floor({num}) | {if(is_numeric(num),floor(num),'')} |
| Finds whether a value is not a number | is_nan({num}) | {if(is_numeric(num),is_nan(num),'')} |
| Natural logarithm | log({num}) | {if(is_numeric(num),log(num),'')} |
| Get value of pi | pi() | {pi()} |
| Exponential expression | pow({num},{num2}) | {if(is_numeric(num) && is_numeric(num2),pow(num,num2),'')} |
| Generate a random integer | rand() | {rand()} |
| Rounds a float | round({num}) | {if(is_numeric(num),round(num),'')} |
| Sine | sin({num}) | {if(is_numeric(num),sin(num),'')} |
| Square root | sqrt({num}) | {if(is_numeric(num),sqrt(num),'')} |
| Calculate the sum of values in an array | sum({num}) | {if(is_numeric(num),sum(num),'')} |
| Tangent | tan({num}) | {if(is_numeric(num),tan(num),'')} |
| Find lowest value | min({num2},{num},{num}+{num2},{num}-{num2},{num}*{num2},{num}/2) | {if(is_numeric(num),min(num2,num,num+num2,num-num2,num*num2,num/2),'')} |
| Find highest value | max({num2},{num},{num}+{num2},{num}-{num2},{num}*{num2},{num}/2) | {if(is_numeric(num),max(num2,num,num+num2,num-num2,num*num2,num/2),'')} |
| Sum | sum({num2},{num},{num}+{num2},{num}-{num2},{num}*{num2},{num}/2) | {if(is_numeric(num),sum(num2,num,num+num2,num-num2,num*num2,num/2),'')} |
| Join array elements with a string | implode('~',{num2},{num},{num}+{num2},{num}-{num2},{num}*{num2},{num}/2) | {implode('~',num2,num,num+num2,num-num2,num*num2,num/2)} |
| Get the integer value of a variable | intval({num}) | {if(is_numeric(num),intval(num),'')} |
| Finds whether the type of a variable is float | is_float({num}) | {if(is_numeric(num),is_float(num),'')} |
| Finds whether the type of a variable is integer | is_int({num}) | {if(is_numeric(num),is_int(num),'')} |
| Finds whether the type of a variable is NULL | is_null({num}) | {is_null(num)} |
| Finds whether a variable is a number or a numeric string | is_numeric({num}) | {is_numeric(num)} |
| Finds whether the type of a variable is string | is_string({num}) | {is_string(num)} |
| Determine whether a variable is considered to be empty | is_empty({num}) | {is_empty(num)} |
en N 1 1
Q S num 1 Enter a number en N 1 300 500 11 1
Q S num2 1 Enter another number en N 1 300 500 11 1
G Dynamic Relevance 1 Shows how Relevance can be change question visibility (e.g. dynamic branching). en
Q S name 1 What is your name? en N 1 300 500 11 1
Q N age ! is_empty(name) How old are you? Only asked if you provide a name en N 1
Q Y married age > 5 Are you married? Only asked if age > 5 (and one hopes much older) en N 1
Q N yearsMarried "married == ""Y""" How many years have you been married, {name}? en N 1 1 age-5
Q N numKids age > 11 How many children do you have? Only asked if your age is > 11 (and one hopes much older) en N 1
Q N kid1 numKids >= 1 How old is your first child? en Y N 1
Q N kid2 numKids >= 2 How old is your second child? en Y N 1
Q N kid3 numKids >= 3 How old is your third child? en Y N 1
Q N kid4 numKids >= 4 How old is your fourth child? en Y N 1
Q N kid5 numKids >= 5 How old is your fifth child? en Y N 1
Q X message2 1 {if(is_empty(name),'Please enter some information about yourself',implode(' ','Hi',name,'!'))}