How would you add every third number, starting with 1, under 100 and create an array?

I am not the familiar with matlab syntax

Answer 1

[Image Analyst]

Try this:

% Create a 1-D vector:
% Every third number starting with 1 up to but not exceeding 100.
v = 1 : 3 : 100
% Do the addition
theSum = sum(v)

[Hannah Bartolo]

thank you. And in creating and array and performing those vectors operations, would the array be a= [1,4,7...97];?

[Image Analyst]

Hannah, when you get around to actually trying it you'll see this in the command window:

>> v = 1 : 3 : 100
v =
  Columns 1 through 19
     1     4     7    10    13    16    19    22    25    28    31    34    37    40    43    46    49    52    55
  Columns 20 through 34
    58    61    64    67    70    73    76    79    82    85    88    91    94    97   100

Since you didn't want the 100 but wanted to end at 97 and wanted your vector named a instead of v, you'd do

>> a = 1 : 3 : 97

Answer 2

[Akshay Srivastava]

mat = 1:3:100, if you want the vector to be [1,4,7...100] and try mat = 1:3:97 if you want the vector to be [1,4,7,...,97].