string(5)

string(0.5)

string(-0.5)

string(true())

string(false())

string(12345678901234567890)

string(-12345678901234567890)

concat("titi","toto")

concat("titi","toto","tata")

concat("titi",'toto')

concat("titi",'toto',"tata","last")

starts-with("tititoto","titi")

starts-with("tititoto","to")

contains("tititototata","titi")

contains("tititototata","toto")

contains("tititototata","tata")

contains("tititototata","tita")

substring("12345",2,3)

substring("12345",2)

substring("12345",-4)

substring("12345",3.4)

substring("12345",3.6)

substring("12345",1.5,2.6)

substring("12345",2.2,2.2)

substring("12345",0,3)

substring("12345",-8,10)

substring("12345",4,-10)

substring("12345",0 div 0, 3)

substring("12345",1, 0 div 0)

substring("12345",1 div 0, 3)

substring("12345",3,-1 div 0)

substring("12345",-42, 1 div 0)

substring("12345",-1 div 0, 1 div 0)

substring("12345",-1 div 0,5)

string-length("")

string-length("titi")