We have to print an arithmetic progressive series in PHP, between two given numbers a and b both including, with a given common arithmetic difference of d.
Input : $a = 200, $b = 250, $d = 10 Output : 200, 210, 220, 230, 240, 250 Input : $a = 10, $b = 100, $d = 20 Output : 10, 30, 50, 70, 90
This problem can be solved using loops by iterating from $a to $b and incrementing the loop variable by $d. But in PHP we can also make use of some inbuilt functions to solve this particular problem.
We will have to use the below two functions for this purpose:
- range() function: This function is used to create an array of elements of any kind such as integer, alphabets within a given range(from low to high) i.e, list’s first element is considered as low and last one is considered as high.
- implode() function: If we have an array of elements, we can use the implode() function to join them all to form one string. We basically join array elements with a string.
The idea to solve this problem using the above two inbuilt functions is to first use the range() function to generate an array of values between $a and $b where the values are incremented by $d. After generating the array we will use the implode() function to create a string from the array where elements will be separated by comma(,) separator.
1, 16, 31, 46, 61, 76, 91
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