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Pls I need the solution to this Question: php >> functions >> module 6 >> Q1, with comprehensive explanation pls. Thanks

7th Jan 2017, 6:22 PM
Oluseye Hassan
Oluseye Hassan - avatar
3 Réponses
+ 4
@Ahmed Al/malaji: and the comprehensive explanation? :P function func($arg) { $result=0; for ($i=0; $i<$arg; $i++) { $result=$result+$i; } return $result; } echo func(5); The last line call the function "func", which is declared in previous lines, passing to it the value 5 as argument. So, starting 'func', the variable $arg is initialized with the value 5. First line of 'func', a variable named 'result' is initialized with the value of 0. Second line, is a 'for' loop statement: in the parenthesis, you have three zones, semi-colon separated, defining respectivly: - loop initialization ( executed once, at start of loop ): initialize the variable named 'i' to value 0; - test condition: before each iteration ( one execution of the code block associated/nexted with the 'for' statement ); - incrementation : executing at end of each loop iterations... in this code, the varaible 'i' is incrementique ( adding one to it )... So: - before 1st iteration: $arg==5, $result==0, $i=0; - test $i<$arg <=> 0<5 is true, - so loop code block run and at end: $arg==5, $result==0 (0=0+0), $i=1; which is state before 2nd iteration... - before 2nd iteration: test $i<$arg <=> 1<5 is true, - so loop code block run and at end: $arg==5, $result==1 (1=0+1), $i=2; - before 3rd iteration: test $i<$arg <=> 2<5 is true, - so loop code block run and at end: $arg==5, $result==3 (3=1+2), $i=3; - before 4th iteration: test $i<$arg <=> 3<5 is true, - so loop code block run and at end: $arg==5, $result==6 (6=3+3), $i=4; - before 5th iteration: test $i<$arg <=> 4<5 is true, - so loop code block run and at end: $arg==5, $result==10 (6=6+4), $i=5; - before 6th iteration: test $i<$arg <=> 5<5 is false, - so loop code block no more running, and next instruction after the loop code block is executed, so, in this code, the value of variable 'result' ( 10 ) will be returned to the echo statement...
7th Jan 2017, 6:59 PM
visph
visph - avatar
+ 2
Thanks man
8th Jan 2017, 12:15 AM
Oluseye Hassan
Oluseye Hassan - avatar
0
10
7th Jan 2017, 6:28 PM
ASNM
ASNM - avatar