Go: package main

import (
	"fmt"
	"strconv"
)

func main() {
	for _, leftValue := range MultiplicationTableNum(9) {
		for _, rightValue := range MultiplicationTableNum(9) {
			strLeftVal, strRightVal, strMulti := strconv.Itoa(leftValue), strconv.Itoa(rightValue), strconv.Itoa(Multiplication(leftValue, rightValue))
			fmt.Println(strLeftVal + "x" + strRightVal + "=" + strMulti)
		}
	}
}

func MultiplicationTableNum(num int) []int {
	multiNum := []int{}
	for i := 1; i <= num; i++ {
		multiNum = append(multiNum, i)
	}
	return multiNum
}

func Multiplication(x, y int) int {
	return x * y
}

C++: #include <bits/stdc++.h>
using namespace std;
#define FOR(i, s, n) for(int i = s; i < (int)n; i++)
#define per(i, n) for(int i = n; i >= 0; i--)
#define ROF(i, s, n) for(int i = s; i >= (int)n; i--)
#define FORIT(i, A) for (auto i : A)
#define PRINT(x) cout << (x) << "\n"
#define ALL(a) (a).begin(),(a).end()
#define RALL(a) (a).rbegin(), (a).rend()
#define MP make_pair
#define EACH(i, n) for (__typeof((n).begin()) i = (n).begin(); i != (n).end(); ++i)
#define SZ(a) int((a).size())
#define EXIST(s,e) ((s).find(e)!=(s).end())
#define SORT(c) sort((c).begin(),(c).end())
#define CLR(a) memset((a), 0 ,sizeof(a))
#define NCLR(a) memset((a), -1 ,sizeof(a))
#define dump(x) cout << #x << " = " << (x) << "\n";
#define debug(x) cout << #x << " = " << (x) << " (L" << __LINE__ << ")" << " " << __FILE__ << "\n";
#define sq(n) (n) * (n)
typedef vector<int> VI;
typedef vector<VI> VVI;
typedef vector<string> VS;
typedef pair<int, int> PII;
typedef long long LL;
typedef vector<LL> VLL;
typedef vector<VLL> VVLL;
typedef unsigned int uint;
typedef unsigned long long ull;
typedef priority_queue<int> maxpq;
typedef priority_queue< int, vector<int>, greater<int> > minpq;
typedef complex<double> P;
static const double EPS = 1e-10;
static const double PI = acos( -1.0 );
static const int mod = 1000000007;
static const int INF = 1 << 29;
static const LL LL_INF = 1152921504606846976;
static const int dx[] = { -1, 0, 1, 0, 1, -1, 1, -1 };
static const int dy[] = { 0, -1, 0, 1, 1, 1, -1, -1 };


int main() {
#ifdef _DEBUG
	printf( "debug\n" );
#endif
	for ( int i = 1; i < 10; i++ ) {
		for ( int j = 1; j < 10; j++ ) {
			printf( "%dx%d=%d\n", i, j, i * j );
		}
	}
	return 0;
}

C++: #include<iostream>
using namespace std;

int main(){
  for(int i = 1 ; i <= 9 ; i++ ){
    for(int t = 1 ; t <= 9 ; t++){
      cout << i << "x" << t << "=" << i*t << endl;
    }
  }
  return 0;
}

C++: #include<iostream>
using namespace std;

int main(){

    return 0;
}

C++: int i,j;main(){for(;++i<=9;)for(j=1;j<=9;)printf("%dx%d=%d\n",i,j++,i*j);}

C++: #include <iostream>

#define rep(i, n) for(int i = 1; i <= n; i ++)

using namespace std;

int main(void){
	rep(i, 9)rep(j, 9) cout << i << "x" << j << "=" << i * j << endl;

	return 0;
}

C++: #include <iostream>
#include <algorithm>
#include <vector>

int main(){
    std::ios::sync_with_stdio(false);
    std::cin.tie(0);

    for(int i=1; i<=9; ++i){
        for(int j=1; j<=9; ++j){
            std::cout << i << "x" << j << "=" << i*j << "\n";
        }
    }
    return 0;
}

C++: #include <iostream>

using namespace std;

int main()
{
	for (int x = 1; x <= 9; x++) {
		for (int y = 1; y <= 9; y++) {
			cout << x << "x" << y << "=" << x * y << endl;
		}
	}
	return 0;
}

C++: #include <stdio.h>

int main(){
	int i,j;
	for(i=1;i<=9;i++){
		for(j=1;j<=9;j++){
			printf("%dx%d=%d\n",i,j,i*j);
		}
	}
	return 0;
}

C++: #include<stdio.h>
int main(void)
{
for(int f1=1;f1<=9;f1++){
for(int f2=1;f2<=9;f2++){
printf("%dx%d=%d\n",f1,f2,f1*f2);
}
}
return 0;
}

C++: #include <iostream>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <vector>
#include <algorithm>
#include <utility>
#include <queue>

using namespace std;
int main(){
	for(int i=1;i<10;i++){
		for(int j=1;j<10;j++){
			cout<<i<<"x"<<j<<"="<<i*j<<"\n";
		}
	}
	return 0;
}

C++: #include<stdio.h>
int main(){int i=1,j;for(;i<=9;i++)for(j=1;j<=9;j++)printf("%dx%d=%d\n",i,j,i*j);}

C++: class Main {
    public static void main(String[] a) {
	for(int i=1; i<=9; i++) {
	    for(int j=1; j<=9; j++) {
		System.out.println(i+"x"+j+"="+i*j);
	    }
	}
    }
}