How to get the last index in a for loop
How to get the last index in a for loop
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Alister jordan · External communityPost link
External question — Stack Overflow Stack Exchange
Author: Alister jordan
Original post: https://stackoverflow.com/questions/63721860
License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/
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i am coding in a language similar to c++ known as mql5.(for mt5 trading platform) they have many similarities... i have a for loop as shown below:
void OnTick() // this functon basically executes the code after every price change.
{
for (int i = 0; i<5; i++) //the for loop function
{
Print(i); //this prints the loop
}
}
the result of the code above with each price change overtime is:
13:27:18.706 0
13:27:18.706 1
13:27:18.706 2
13:27:18.706 3
13:27:18.706 4
13:27:18.900 0
13:27:18.900 1
13:27:18.900 2
13:27:18.900 3
13:27:18.900 4
question is, how do i access the last element in the index of the for loop and get it to print 4th index each time price changes? mql5 is somewhat similar as c++. is there anything i can carry from c++?
eg
13:27:18.706 4
13:27:18.900 4
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Jan Schultke · External communityPost link
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Author: Jan Schultke
Original post: https://stackoverflow.com/a/63721892
License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/
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All you need to do is pull
i
outside the loop:
void OnTick()
{
int i = 0;
for (; i < 5; i++)
{
Print(i);
}
// i is now one past the last index
int last = i - 1;
}
If you know that you loop
5
times in advance, you could also obtain the last index using:
int last = 5 - 1;
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Ted Lyngmo · External communityPost link
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Author: Ted Lyngmo
Original post: https://stackoverflow.com/a/63722014
License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/
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Don't use magic numbers.
5
is a magic number. Give it a meaningful name, like
number_of_prices
.
constexpr size_t number_of_prices = 5;
void OnTick()
{
for (size_t i = 0; i < number_of_prices; ++i) //the for loop function
{
Print(i); //this prints the loop
}
Print(number_of_prices - 1); // access last price
}
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Quoted from Forex.com.bd-Editorial External question — Stack Overflow Stack Exchange Author: Alister jordan Source score (net votes, not local likes): 0 Original post: https://stackoverflow.com/questions/63721860 License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/ Adaptation: HTML converted to plain text; contact email addresses removed. i am coding in a language similar to c++ known as mql5.(for mt5 trading platform) they have many similarities... i have a for loop as shown below: void OnTick() // this functon basically executes the code after every price change. { for (int i = 0; i<5; i++) //the for loop function { Print(i); //this prints the loop } } the result of the code above with each price change overtime is: 13:27:18.706 0 13:27:18.706 1 13:27:18.706 2 13:27:18.706 3 13:27:18.706 4 13:27:18.900 0 13:27:18.900 1 13:27:18.900 2 13:27:18.900 3 13:27:18.900 4 question is, how do i access the last element in the index of the for loop and get it to print 4th index each time price changes? mql5 is somewhat similar as c++. is there anything i can carry from c++? eg 13:27:18.706 4 13:27:18.900 4
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