Make a loop in such way that i will be increasing by 5 from 4 up to 30 and by 3 from 30 till up to 50.

im still confused on using while loops and if loops can someone help me with this question

[Rik]

It is extremely rude to edit away your question, especially if you received an answer from someone who took the time to read and understand your question and then spent time finding a solution and posting an answer. If you want private help, hire a consultant.

[Rena Berman]

(Answers Dev) Restored edit

Answer 1

[Walter Roberson]

for VariableName = [4:5:30,30:3:50]

Note that in a case like this, you should always check in case you accidentally repeat a value. For example, [4:13:30, 30:3:50] would start [4, 17, 30] and then continue from [30 33 36 ...] . It so happens that 4:5:30 stops at 29 and so there is no duplication of 30.

[Walter Roberson]

for VariableName = [4:5:30,30:3:50]
    something
end

is the same as

for VariableName = [4:5:30]
    something
end
for VariableName = [30:3:50]
    something
end

In turn,

for VARIABLENAME = FIRST_VALUE : INCREMENT : FINALVALUE
    something
end

for positive increment is the same as (for your needs, but some of the details differ)

VARIABLENAME = FIRST_VALUE;
while VARIABLE_NAME <= FINALVALUE
    something
    VARIABLENAME = VARIABLENAME + INCREMENT;
end

So you can simply write two while loops in a row.

However, you can also code something like,

VARIABLENAME = FIRST_VALUE;
first_phase = true;
while VARIABLE_NAME <= FINALVALUE
    something
    if first_phase
        VARIABLENAME = VARIABLENAME + FIRSTINCREMENT;
        if VARIABLENAME > BREAKPOINT
            VARIABLENAME = BREAKPOINT;
            first_phase = false;
        end
    else
        VARIABLENAME = VARIABLENAME + SECONDINCREMENT;
    end
end