Conditional statement

Conditional Statement : A conditional statement is a control statement that executes different blocks of code depending on whether a condition is true or false.
A conditional statement is used to make decisions in a program based on a condition.

1] IF Condition:

#include <stdio.h>
int main() {
    int age = 20;

    // If statement
    if (age >= 18) {
        printf("Eligible for vote");
    }
}

2] IF - ELSE Condition:

#include<stdio.h>
int main()
{
    int a;
    scanf("%d",&a);
    
    if(a>=13)
    {
        printf("a is higher");
        
    }
    else
    {
        printf("a is lower");
    }
    return 0;
}


3] Nested IF-ELSE:

#include <stdio.h>

int main(){
    int age = 11;

    if (age >= 18) {
        if (age >= 60)
            printf("Eligible to vote (Senior Citizen)\n");
        else
            printf("Eligible for vote\n");
    }
    else {
        printf("Not eligible to vote (Under 18)\n");
        if (age >= 13) 
                printf("teenager\n");
            else
                printf("not a teenager\n");
        }

    return 0;
}


4] if-else-if Ladder:  The if else if ladder  statements are used when the user has to decide among multiple options.

#include <stdio.h>

int main() {
    int i = 20;

    // If else ladder with three conditions
    if (i == 10)
        printf("Not Eligible");
    else if (i == 15)
        printf("wait for three years");
    else if (i == 20)
        printf("You can vote");
    else
        printf("Not a valid age");
        
    return 0;
}