In this program, we are going to left-shift the elements in the array n number of times. To perform the left shift on elements first we have to assign a value to the variable n and shift the index of the element n times. For example, the array is 5,9,8,6,7,3,4,2,1 and n is 2 then the output will be 8 6 7 3 4 2 1 5 9.
For this program to left shift elements in the array, we are taking the static values which are assigned to the array a[]. Then we have to assign the value of the number of times the element hast perform left shift into the variable n and assign the size of the array into the variable len using the built-in function count()
and after that, we have to assign the value 0 into the variable i and perform the loop until the condition 'i < n' and also increment the value of the variable i in every iteration and in the loop block we have to assign the element of a[0] into the variable temp then we have to assign the value 0 into the variable j and perform the loop until the condition 'j < len - 1' and also increment the value of the variable j in every iteration and in the loop block we have to assign the value of a[j + 1] into the array a[j] after the completion of this loop we have to assign the value of the variable temp to the array a[j]. After the completion of the main loop, we can print the array a[] as the left-shifted array.
Step 1: Initialize an array a[] with values
Step 3: Assign the number of times the array should perform the left shift into the variable n
Step 4: Assing the size of an array into the variable len using the built-in function count()
Step 5: Print the element in the array a[]
Step 6: To left shift the elements of array n times first assign the value 0 into the variable i and perform the sub-steps until the condition 'i < n' becomes false and increment the value of variable i in every iteration
(i) Assign the element of a[0] to the variable temp
(ii) Assign the value 0 into the variable j and perform the sub-step until the condition 'j < len - 1' becomes false and increment the value of variable j in every iteration
(a) Assign the value of 'a[j + 1] into variable a[j]
(iii) Assign the value of temp to the array a[j]
Step 7: After the completion of step 6 print the elements of the array a[] as left-shifted n times
<?php
$a = array(1, 2, 3, 4, 5, 6, 7, 8, 9);
$n = 4;
$len = count($a);
echo "Elements in the array: \n";
for ($i = 0; $i < $len; $i++) {
echo "$a[$i] ";
}
for ($i = 0; $i < $n; $i++) {
$temp = $a[0];
for ($j = 0; $j < $len - 1; $j++) {
$a[$j] = $a[$j + 1];
}
$a[$j] = $temp;
}
echo "\nArray after the left shift of $n times:\n";
for ($i = 0; $i < $len; $i++) {
echo "$a[$i] ";
}
Elements in the array: 1 2 3 4 5 6 7 8 9 Array after the left shift of 4 times: 5 6 7 8 9 1 2 3 4