CalcPlus

CalcPlus[ s1, s2, ... ]

CalcPlus[ s1, s2, ... ] returns the sum of s1, s2, ...

Example in out
The sum of 1 and 2. CalcPlus[ 1,2 ] 3
The sum of 0.5, 1.4 and 2.1. CalcPlus[ 0.5, 1.4, 2.1 ] 4
The sum of x and y, both defined as 8 in the script. CalcPlus[x, y] 16
The sum of 13 and -1. CalcPlus[13, -1] 12