Syntax
expression1 + expression2
Arguments
expression1,expression2 numeric constants, string constants or variables.
Returns
Result of the sum of expression1 + expression2, if both expressions are numbers (variables are assumed to be numeric).
Result of expression1 add expression2, if either expression is a string constant (SWiSHscript extension).
Description
If both expressions are integers, the sum is an integer. If either or both expressions are floating-point numbers, the sum is a floating-point number. If either expression is a string constant, the result is expression1 add expression2.
Sample
This statement below adds the integers 2 and 3 and displays the resulting integer, 5, in the 'Output' window:
trace (2 + 3);
This statement below adds the floating-point numbers 2.5 and 3.25 and displays the result, 5.75, a floating-point number, in the 'Output' window:
trace (2.5 + 3.25);
This statement below writes the string "1122" to the 'Debug' window"
trace(11 + "22"); // converts both to string because of "22"
onLoad () {
a = "10";
b = "eats dog";
c = "cat ";
trace(1 + a);
trace(a + b);
trace("cat" + " eats dog");
trace(a add b);
trace(c add b);
}
Produces the output
11
10
cat eats dog
10eats dog
cat eats dog
See Also
Variables and String Conversion for more information about automatic type conversion of variables.