Loops in Matlab ( for in matlab, while matlab, for matlab)

There are two loops in matlab:

• For loops 
• While loops

For loops are used when the number of loop is certain whereas while loops are used when the condition is specified for a loop to terminate the code in it. 

You can see the usage form of for loops and while loops from given examples below:

Example 1: For loop

for i=1:4, i end

Example 2: While loop

a=0; while(a<10) a= a+1; a

For information in detail type in command window:

'help for' to get the following result:

for Repeat statements a specific number of times. The general form of a for statement is: for variable = expr, statement, ..., statement END The columns of the expression are stored one at a time in the variable and then the following statements, up to the END, are executed. The expression is often of the form X:Y, in which case its columns are simply scalars. Some examples (assume N has already been assigned a value). for R = 1:N for C = 1:N A(R,C) = 1/(R+C-1); end end Step S with increments of -0.1 for S = 1.0: -0.1: 0.0, do_some_task(S), end Set E to the unit N-vectors for E = eye(N), do_some_task(E), end Long loops are more memory efficient when the colon expression appears in the for statement since the index vector is never created. The BREAK statement can be used to terminate the loop prematurely. See also parfor, if, while, switch, break, continue, end, colon. Reference page in Help browser doc for

or you can type doc for  to get reference page in help browser. I am not giving it here.

For while loops you can type:

'help while' to get information in detail like as given below:

>> help while while Repeat statements an indefinite number of times. The general form of a while statement is: while expression statements END The statements are executed while the real part of the expression has all non-zero elements. The expression is usually the result of expr rop expr where rop is ==, <, >, <=, >=, or ~=. The BREAK statement can be used to terminate the loop prematurely. For example (assuming A already defined): E = 0*A; F = E + eye(size(E)); N = 1; while norm(E+F-E,1) > 0, E = E + F; F = A*F/N; N = N + 1; end See also for, if, switch, break, continue, end. Reference page in Help browser doc while

or you can type 'doc while'  to get reference page in help browser. I am not giving it here.

If you have any question or need some help, leave a comment below.

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