Syntax for Nested If:
if (condition) {
if (Nested if's Condition) {
<True Block>
} else {
<False Block>
}
} else {
if (Nested if's Condition) {
<True Block>
} else {
<False Block>
}
}
If statement or if-else statement present inside another if or else block(as shown above) is called nested if statements.
Example C program using nested-if statement:
#include <stdio.h>
int main() {
int num1, num2, num3;
printf("Enter 3 numbers:");
scanf("%d%d%d", &num1, &num2, &num3);
if (num1 > num2) { // expression for if statement
if (num1 > num3) { // nested if -> if statement inside another if block
printf("%d is greatest\n", num1);
} else {
printf("%d is greatest\n", num3);
}
} else {
if (num2 > num3) { // nested if -> if statement inside another else block
printf("%d is greatest\n", num2);
} else {
printf("%d is greatest\n", num3);
}
}
return 0;
}
Output:
jp@jp-VirtualBox:~/$ ./a.out
Enter 3 numbers:10 20 30
30 is greatest
Enter 3 numbers:10 20 30
30 is greatest
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