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Armstrong numbers, also known as narcissistic numbers or pluperfect digital invariant numbers, are a fascinating mathematical concept that holds significance in the world of programming. An Armstrong number is a number that is equal to the sum of its own digits, each raised to the power of the number of digits. In this article, we’ll explore how to identify Armstrong numbers using a for loop in the C programming language. We’ll also discuss an alternative method to find Armstrong numbers without using a loop. By delving into this concept, you’ll gain insights into programming logic, loops, and mathematical properties.<\/p>\n
What is the Armstrong Number?
\nA number called the Armstrong number is the sum of its digits\u2019 cubes. The Armstrong numbers, for illustration, are 0, 1, 153, 370, 371, and 407.
\nBefore continuing with this article, we recommend that you should learn these C programming topics:<\/p>\n
A number called the Armstrong number is the sum of its digits’ cubes. The Armstrong numbers, for illustration, are 0, 1, 153, 370, 371, and 407.
\nBefore continuing with this article, we recommend that you should learn these C programming topics:<\/p>\n
Consider the number 407; it has three digits, thus it can be written as: Let input is equal to 153<\/strong> for i=1<\/strong> for i=2<\/strong> for i=3<\/strong> The loop will break and if else condition will be checked as or result=153 and check=153 After processing the last digit, we need to remove it. \/10 will give an integer such that the order of the number will be reduced and the next digit will become the last digit.<\/p>\n Method 1:<\/strong> In this method, we will take a three-digit number let’s say 371 and we will check if 371 is an Armstrong number or not.
\n(407) \u2014> (44<\/em>4) + (00<\/em>0) + (77<\/em>7)
\n64 + 0 + 343
\n=> 407
\n407 is an Armstrong number because it is the sum of the cubes of its digits.<\/p>\nExplanation with Example<\/h3>\n
\nvariable values before for loop
\nnum=153; check=153; Armstrong=0; result=0;
\nvalues of the variable in for loop are line by line<\/p>\n
\nArmstrong=3;
\nnum=15;
\nArmstrong=33<\/em>3=27
\nresult=0+27=27;
\nfor loop condition check: num is not equal to zero loops will run again<\/p>\n
\nArmstrong=5;
\nnum=1;
\nArmstrong=55<\/em>5=125
\nresult=27+125=152;
\nfor loop condition: num is not equal to zero loops will run again<\/p>\n
\nArmstrong=1;
\nnum=0;
\nArmstrong=11<\/em>1=1;
\nresult=152+1=153;
\nIn for loop condition, the num is EQUAL TO ZERO therefore, the loop will run again<\/p>\n
\nif the condition will true program will show the output
\n153 is an Armstrong Number<\/strong><\/p>\nArmstrong Number Algorithm:<\/h2>\n
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C Program Code to Check Armstrong Number<\/h2>\n
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