UE4 blueprint learning chapter (IV) -- process control forloop and whileloop

Today, I will introduce another process control node .

Process control -ForLoop

ForLoop It is processed by using the counting cycle function of the counter . Loop in from the first index value , Then add... In turn 1, The loop ends when the last index is reached .

First Index: The first index value ,Last Index: Last index value ,Loop Body: The loop body

Index: Current index ,Completed： Actions performed after the loop ends  

An array with the ForEachLoop

Arrays can centrally manage multiple values , A loop is used to process all the data stored in the array .

Add an array , And add some elements to it

Array When connected, an established array ,LoopBody It's a circular body ,ArrayElement It's an array element ,ArrayIndex Is the array index , from 0 Start ,Compieted Is the operation after completion . 

  Example ： Average the elements in an array  

 

whileLoop

whileLoop Need one bool Value to determine whether it enters the loop , When bool The value is false When you exit the loop .

Example ： Judge whether a number is a prime number

except 1 And itself , It can't be divided by other books

First judge num Whether the value is and counter equal , If false, Then judge %counter Is it 0, If it can be counter to be divisible by , It's not prime ,counter Every time add 1 .