The next statement occurs at the end of a for...next construct and causes the iteration counter to increment and branches to the corresponding for statement to decide whether to terminate.
for var = exp to exp{step exp}
statement{s}
next {var}
The for...next construct can also be exited using the exit clause.
The step clause allows the increments of the loop to be changed. For example, step 2 increments the variable by 2 when the next statement is encountered. The step clause can be a negative number, decrementing the variable at the next statement. A step of 0 does not execute the for...next loop.
The var is optional. It is typically used for code clarity, but is ignored by the compiler.
Example 1
for i = 1 to 10 crt i:" ": next i print
Example 1 output result:
1 2 3 4 5 6 7 8 9 10
Example 2
numbers = ’’
for i = 1 to 2
for j = 1 to 5
numbers<i,j> = j
next j
next i
print numbers
Example 2 output result:
1]2]3]4]5^1]2]3]4]5
Example 3
for j = 10 to 1 step -1 print j:" ": next print
Example 3 output result:
10 9 8 7 6 5 4 3 2 1