C Exercises: Determine the LCM of two numbers

Last update on May 27 2022 12:25:06 (UTC/GMT +8 hours)

C For Loop: Exercise-45 with Solution

Write a program in C to find LCM of any two numbers.

Pictorial Presentation:

Sample Solution:

C Code:

#include <stdio.h>

void main()  
{  
    int i, n1, n2, max, lcm=1;  
  
 
     printf("\n\n  LCM of two numbers:\n ");
     printf("----------------------\n");


    printf("Input 1st number for LCM: ");  
    scanf("%d", &n1);  
    printf("Input 2nd number for LCM: ");  
    scanf("%d", &n2);

  
    max = (n1>n2) ? n1 : n2;  
  
  
    for(i=max;  ; i+=max)  
    {  
    
        if(i%n1==0 && i%n2==0)  
        {  
            lcm = i;  
            break;  
        }  
    }  
  
    printf("\nLCM of %d and %d = %d\n\n", n1, n2, lcm);  
 
}

Sample Output:

  LCM of two numbers:                                                                                         
 ----------------------                                                                                       
Input 1st number for LCM: 15                                                                                  
Input 2nd number for LCM: 20                                                                                  
                                                                                                              
LCM of 15 and 20 = 60

Flowchart:

C Programming Code Editor:

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Next: Write a program in C to convert a binary number into a decimal number using math function.

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C Programming: Tips of the Day

Static variable inside of a function in C

The scope of variable is where the variable name can be seen. Here, x is visible only inside function foo().

The lifetime of a variable is the period over which it exists. If x were defined without the keyword static, the lifetime would be from the entry into foo() to the return from foo(); so it would be re-initialized to 5 on every call.

The keyword static acts to extend the lifetime of a variable to the lifetime of the programme; e.g. initialization occurs once and once only and then the variable retains its value - whatever it has come to be - over all future calls to foo().

Ref : https://bit.ly/3fOq7XP